Skip to content

USA's Most Trusted MRCOOL Dealer – Free Shipping On Systems*

Local Help (417) 291-9921 Toll Free (800) 651-9297 Email Support
Live Help Currently Closed
Today's status Currently Closed

Regular hours Mon-Fri 9:00am-5:00pm CT
Weekend Closed Sat-Sun
Email Support
  • Facebook
  • YouTube
  • TikTok
DIY HVAC systems, MRCOOL, Mini-Splits, Air Conditioning
  • Mini Splits›
    RecommendedRecommended for multi-zoneBUILD A DIY MULTI-ZONE SYSTEMConfigure zones, indoor units, capacities, and line-set lengths.START BUILDING →
    Installation pathDesigned for DIY InstallationHomeowner-oriented systems with factory-precharged connection options.Shop DIY systems →Installation pathProfessional InstallationCompare Olympus and Advantage systems intended for traditional HVAC installation.Compare systems → Planning a complete system?Financing AvailableExplore payment options for a complete multi-zone purchase.View financing →
    • Build Your System ›
      • Multi-Zone System Builder
      • Olympus System Builder
      • Mini-Split BTU Calculator
    • Shop by System ›
      • Shop All Mini Splits
      • Shop All DIY Mini Splits
      • Single Zone Systems
      • Multi-Zone Systems
      • DIY Pre-Charged Systems
    • Shop by Zones ›
      • 2 Zones
      • 3 Zones
      • 4 Zones
      • 5 Zones
      • 6 Zones
    • Popular Series ›
      • 5th Gen DIY
      • DIY Hyper Heat
      • Easy Pro
      • Olympus
    Not sure what size?Plan before you buyUse the BTU calculator as a starting point for system sizing.Open BTU calculator →
  • Central HVAC›
    DIY hybrid configurationPlan a DIY Hybrid SystemCombine a central ducted air handler with supported wall or cassette zones on a DIY multi-zone condenser.Open Hybrid Builder →
    Before you chooseInstallation Varies by ConfigurationSome eligible split systems offer precharged options; packaged, furnace, and traditional configurations follow professional-installation paths.Get selection help → Planning a whole-home purchase?Financing AvailableReview payment options for larger equipment purchases.Explore financing →
    • Build & Plan ›
      • Build a Central System
      • Manual J Load Calculator
      • Get a Free Quote
    • Shop by System ›
      • Central Ducted Heat Pumps
      • Dual Fuel Systems
      • Package Units
      • Gas Furnaces
    • Shop by Series ›
      • Universal Series
      • Hyper Heat Series
      • VersaPro Series
      • Signature Series
    Sizing & planningManual J Load CalculatorEstimate heating and cooling loads before selecting equipment.Open Manual J →
  • Specialty›
    TravelCool rooftop RV air conditioner at a lakeside campsite Comfort for the roadRV air conditioningTravelCool RV Air ConditioningRooftop cooling and supplemental heat-pump heating for RV applications.Explore TravelCool →
    • TravelCool / RV Air Conditioners
    • Monoblock Heat Pumps
    • Compact Refrigeration
    • Water Heaters
    • Industrial HVLS Fans
    • MRBREEZE
    MRCOOL Monoblock heat pump installed through an exterior wall All-in-one HVACMonoblock Heat PumpsHeating and cooling without a separate outdoor unit.Shop Monoblock → MRCOOL compact refrigeration equipment for a walk-in cooler Walk-in coolingCompact RefrigerationSelf-contained refrigeration for walk-in cooler and freezer applications.Explore Refrigeration → MRCOOL industrial HVLS fan installed in a warehouse Large-space airflowIndustrial HVLS FansLarge-diameter fans for warehouses and other expansive spaces.Shop HVLS Fans →
  • Parts & Accessories›
    Replacement partsStart with your model numberShop genuine MRCOOL replacement parts. Confirm equipment details before ordering.Shop replacement parts →
    • Replacement Parts ›
      • Shop All Replacement Parts
      • Control Boards
      • Fan Motors
    • Installation & Accessories ›
      • Line Sets
      • Installation Kits
      • Couplers, Wire & Adapters
      • Condenser Mounting
      • Tools & Gauges
    Installation & accessoriesInstallation essentialsLine sets, mounting, kits, controls, and installation accessories.Shop accessories →
  • Build & Size›
    RecommendedPrimary configuration toolBuild a DIY Multi-Zone SystemBuild a matched MRCOOL DIY multi-zone system from zones through line-set lengths.Start building →
    • System Builders ›
      • Multi-Zone System Builder
      • Hybrid System Builder
      • Olympus System Builder
    • Sizing Tools ›
      • Mini-Split BTU Calculator
      • Manual J Load Calculator
      • HVAC Replacement & Sizing Guide
    Sizing toolsFind the right sizeUse the BTU calculator or Manual J tools before choosing equipment.Start sizing → After you planExplore Payment OptionsAfter configuring and sizing your project, review available financing options.View financing →
  • Learn›
    • Start Learning ›
      • Mini Splits 101
      • DIY Installation Guide
      • Tools & Calculators
    • Help & Reference ›
      • DIY FAQs
      • Error Codes
      • QMID Codes
    • Official Product Information ›
      • Knowledge Center
      • Manuals & Documents
      • AHRI & EnergyGuide Resources
    • View All Learning Center
    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
  • Support›
    Customer supportHow can we help?Contact our team, track an order, start a return, or find warranty help.Get help →
    • Customer Support ›
      • Contact Us
      • Shipping & Tracking
      • Warranty
      • Start a Return
    • Programs & Policies ›
      • Pro Contractor Program
      • Price Match Guarantee
      • Financing
Log inFinancingHelp Center
MRCOOL DIY Direct
Log in Cart
    • Build Your System›
      • Multi-Zone System Builder
      • Olympus System Builder
      • Mini-Split BTU Calculator
    • Shop by System›
      • Shop All Mini Splits
      • Shop All DIY Mini Splits
      • Single Zone Systems
      • Multi-Zone Systems
      • DIY Pre-Charged Systems
    • Shop by Zones›
      • 2 Zones
      • 3 Zones
      • 4 Zones
      • 5 Zones
      • 6 Zones
    • Popular Series›
      • 5th Gen DIY
      • DIY Hyper Heat
      • Easy Pro
      • Olympus
    RecommendedRecommended for multi-zoneBUILD A DIY MULTI-ZONE SYSTEMChoose your zones, indoor units, capacities, and line-set lengths for a matched MRCOOL DIY multi-zone system.START BUILDING →
    Installation pathDesigned for DIY InstallationExplore homeowner-oriented mini splits with factory-precharged connection options.Shop DIY systems →Installation pathProfessional InstallationCompare Olympus and Advantage systems intended for traditional HVAC installation.Compare systems → Planning a complete system?Financing AvailableExplore payment options for a complete multi-zone purchase.View financing →
    Not sure what size?Plan before you buyUse the BTU calculator as a starting point for system sizing.Open BTU calculator →
    • Build & Plan›
      • Build a Central System
      • Manual J Load Calculator
      • Get a Free Quote
    • Shop by System›
      • Central Ducted Heat Pumps
      • Dual Fuel Systems
      • Package Units
      • Gas Furnaces
    • Shop by Series›
      • Universal Series
      • Hyper Heat Series
      • VersaPro Series
      • Signature Series
    DIY hybrid configurationPlan a DIY Hybrid SystemCombine a central ducted air handler with supported wall or cassette zones on a DIY multi-zone condenser.Open Hybrid Builder →
    Before you chooseInstallation Varies by ConfigurationSome eligible split systems offer precharged connection options. Packaged, furnace, and traditional configurations follow professional-installation paths.Get selection help → Planning a whole-home purchase?Financing AvailableReview payment options for larger equipment purchases.Explore financing →
    Sizing & planningManual J Load CalculatorEstimate heating and cooling loads before selecting equipment.Open Manual J →
  • TravelCool rooftop RV air conditioner at a lakeside campsite Comfort for the roadRV air conditioningTravelCoolInverter-driven rooftop cooling and supplemental heat-pump heating for RV applications.Explore TravelCool → MRCOOL Monoblock heat pump installed through an exterior wall All-in-one HVACMonoblock Heat PumpsHeating and cooling without a separate outdoor unit.Shop Monoblock → MRCOOL compact refrigeration equipment for a walk-in cooler Walk-in coolingCompact RefrigerationSelf-contained refrigeration for walk-in cooler and freezer applications.Explore Refrigeration → MRCOOL industrial HVLS fan installed in a warehouse Large-space airflowIndustrial HVLS FansLarge-diameter fans for warehouses and other expansive spaces.Shop HVLS Fans →
    More specialtyWater Heaters →MRBREEZE →View all Specialty Equipment →
    • Replacement Parts›
      • Shop All Replacement Parts
      • Control Boards
      • Fan Motors
    • Installation & Accessories›
      • Line Sets
      • Installation Kits
      • Couplers, Wire & Adapters
      • Condenser Mounting
      • Tools & Gauges
    Replacement partsStart with your model numberShop genuine MRCOOL replacement parts. Confirm equipment details before ordering.Shop replacement parts →
    Installation & accessoriesInstallation essentialsLine sets, mounting, kits, controls, and installation accessories.Shop accessories →
    • System Builders›
      • Multi-Zone System Builder
      • Hybrid System Builder
      • Olympus System Builder
    • Sizing Tools›
      • Mini-Split BTU Calculator
      • Manual J Load Calculator
      • HVAC Replacement & Sizing Guide
    RecommendedPrimary configuration toolBuild a DIY Multi-Zone SystemBuild a matched MRCOOL DIY multi-zone system from zones through line-set lengths.Start building →
    Sizing toolsFind the right sizeUse the BTU calculator or Manual J tools before choosing equipment.Start sizing → After you planExplore Payment OptionsAfter configuring and sizing your project, review available financing options.View financing →
    • Start Learning›
      • Mini Splits 101
      • DIY Installation Guide
      • Tools & Calculators
    • Help & Reference›
      • DIY FAQs
      • Error Codes
      • QMID Codes
    • Official Product Information›
      • Knowledge Center
      • Manuals & Documents
      • AHRI & EnergyGuide Resources
    • View All Learning Center
    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
    • Customer Support›
      • Contact Us
      • Shipping & Tracking
      • Warranty
      • Start a Return
    • Programs & Policies›
      • Pro Contractor Program
      • Price Match Guarantee
      • Financing
    Customer supportHow can we help?Contact our team, track an order, start a return, or find warranty help.Get help →
110% Price Match Financing

USA's Most Trusted MRCOOL Dealer – Free Shipping On Systems*

MRCOOL DIY DIRECT / LIMITED-TIME PROJECT PACKS

5th Gen E-Star Single-Zone Project Packs

Complete 5th Gen E-Star single-zone systems with LineGuard and a Care Kit. Choose one system or a package for several spaces. Standard freight included on buy-now packages.*

Shop Project Packs ↗

Search results

  • HVAC electronic control-board assembly

    Electronic Control Box Subassembly for A-24-HP-WMAH-230B Wall Mount Air Handler

    SALE

    Electronic Control Box Subassembly for A-24-HP-WMAH-230B Wall Mount Air Handler

    Regular price $212.18
    Sale price $212.18 Regular price $241.02
    You Save: $28.84
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $28.84
  • MRCOOL HVAC electronic control-board assembly

    Electronic Control Box Subassembly for MrCool Heat Pump Condenser A-24-HP-C-230B

    SALE

    Electronic Control Box Subassembly for MrCool Heat Pump Condenser A-24-HP-C-230B

    Regular price $397.58
    Sale price $397.58 Regular price $451.62
    You Save: $54.04
    Unit price /  per 
    ⚠️ Only 4 left in stock!
    Shop Now
    Save $54.04
  • MRCOOL HVAC electronic control-board assembly

    MRCOOL A-09-HP-C-230B Condenser Electronic Control Box Subassembly – OEM Replacement (Part #17222000035623)

    SALE

    MRCOOL A-09-HP-C-230B Condenser Electronic Control Box Subassembly – OEM Replacement (Part #17222000035623)

    Regular price $359.47
    Sale price $359.47 Regular price $408.33
    You Save: $48.86
    Unit price /  per 
    ⚠️ Only 1 left in stock!
    Shop Now
    Save $48.86
  • MRCOOL Wi-Fi controller adapter and retail package

    MrCool Smart HVAC Controller Enhanced WiFi Kit for Ductless Split System PN: WMK-19

    SALE

    MrCool Smart HVAC Controller Enhanced WiFi Kit for Ductless Split System PN: WMK-19

    Regular price $64.89
    Sale price $64.89 Regular price $73.71
    You Save: $8.82
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $8.82
  • Handheld HVAC remote control

    Remote Control for 4th Generation DIY and Advantage Series Mini-Split Systems

    SALE

    Remote Control for 4th Generation DIY and Advantage Series Mini-Split Systems

    Regular price $74.16
    Sale price $74.16 Regular price $84.24
    You Save: $10.08
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $10.08
  • MRCOOL handheld HVAC remote control

    MrCool Replacement Remote Control for 3rd Gen DIY Mini Split Systems

    SALE

    MrCool Replacement Remote Control for 3rd Gen DIY Mini Split Systems

    Regular price $64.89
    Sale price $64.89 Regular price $73.71
    You Save: $8.82
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $8.82
  • Display Box Subassembly for MRCOOL Ductless Wall Mounted Air Handler – Fits Olympus Series O-24-HP-WMAH-230A -

    Display Box Subassembly for MRCOOL Ductless Wall Mounted Air Handler – Fits Olympus Series O-24-HP-WMAH-230A

    SALE

    Display Box Subassembly for MRCOOL Ductless Wall Mounted Air Handler – Fits Olympus Series O-24-HP-WMAH-230A

    Regular price $74.16
    Sale price $74.16 Regular price $84.24
    You Save: $10.08
    Unit price /  per 
    ⚠️ Only 2 left in stock!
    Shop Now
    Save $10.08
  • Rectorseal RSH-50 surge protective device 50kA 96415 for HVAC 120/240V electrical surge protection

    Rectorseal RSH-50 Surge Protective Device 50kA (96415) 120/240V HVAC Panel Protector

    SALE

    Rectorseal RSH-50 Surge Protective Device 50kA (96415) 120/240V HVAC Panel Protector

    Regular price $121.83
    Sale price $121.83 Regular price $167.83
    You Save: $46.00
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $46.00
  • MRCOOL handheld HVAC remote control

    Replacement Remote Control for EZPRO Series MRCOOL Mini Split Systems - Part #17317000A63330

    SALE

    Replacement Remote Control for EZPRO Series MRCOOL Mini Split Systems - Part #17317000A63330

    Regular price $71.07
    Sale price $71.07 Regular price $80.73
    You Save: $9.66
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $9.66
  • MRCOOL HVAC temperature sensor with lead wire

    Pipe Temperature Combo Sensor (T2b) – Compatible with MRCOOL Heat Pump Condensers | Part #11201007000007

    SALE

    Pipe Temperature Combo Sensor (T2b) – Compatible with MRCOOL Heat Pump Condensers | Part #11201007000007

    Regular price $61.80
    Sale price $61.80 Regular price $70.20
    You Save: $8.40
    Unit price /  per 
    ⚠️ Only 1 left in stock!
    Shop Now
    Save $8.40
  • Remote Control for MRCOOL 4th Gen DIY Ductless Ceiling Cassette Air Handler (9k, 12k, 18k)

    Remote Control for MRCOOL 4th Gen DIY Ductless Ceiling Cassette Air Handler (9k, 12k, 18k)

    SALE

    Remote Control for MRCOOL 4th Gen DIY Ductless Ceiling Cassette Air Handler (9k, 12k, 18k)

    Regular price $74.16
    Sale price $74.16 Regular price $84.24
    You Save: $10.08
    Unit price /  per 
    ⚠️ Only 2 left in stock!
    Shop Now
    Save $10.08
  • MRCOOL temperature sensor with lead wire

    LOW AMBIENT Temperature SENSOR Room Temperature Sensor for MrCool Ductless Wall Mounted Air Handlers (SKU: 11201007003425)

    SALE

    LOW AMBIENT Temperature SENSOR Room Temperature Sensor for MrCool Ductless Wall Mounted Air Handlers (SKU: 11201007003425)

    Regular price $48.26
    Sale price $48.26 Regular price $69.14
    You Save: $20.88
    Unit price /  per 
    ⚠️ Only 4 left in stock!
    Shop Now
    Save $20.88
  • 75' Feet Control Wire For All MRCOOL Mini-Split Systems -

    75' Feet Control Wire For All MRCOOL Mini-Split Systems

    SALE

    75' Feet Control Wire For All MRCOOL Mini-Split Systems

    Regular price $163.77
    Sale price $163.77 Regular price $186.03
    You Save: $22.26
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $22.26
  • MRCOOL replacement indoor blower motor

    Blower Motor for MrCool Ductless Wall Mounted Air Handler 24k DIY

    SALE

    Blower Motor for MrCool Ductless Wall Mounted Air Handler 24k DIY

    Regular price $258.53
    Sale price $258.53 Regular price $293.67
    You Save: $35.14
    Unit price /  per 
    ⚠️ Only 1 left in stock!
    Shop Now
    Save $35.14
  • MRCOOL wall-mounted smart HVAC thermostat

    3 to 3.5 Ton MRCOOL Thermostatic Expansion Valve Kit H4TXV02

    SALE

    3 to 3.5 Ton MRCOOL Thermostatic Expansion Valve Kit H4TXV02

    Regular price $162.74
    Sale price $162.74 Regular price $184.86
    You Save: $22.12
    Unit price /  per 
    ⚠️ Only 10 left in stock!
    Shop Now
    Save $22.12
  • MRCOOL wall-mounted smart HVAC thermostat

    1.5 to 2.5 Ton MRCOOL Thermostatic Expansion Valve Kit H4TXV01

    SALE

    1.5 to 2.5 Ton MRCOOL Thermostatic Expansion Valve Kit H4TXV01

    Regular price $162.74
    Sale price $162.74 Regular price $184.86
    You Save: $22.12
    Unit price /  per 
    ⚠️ Only 11 left in stock!
    Shop Now
    Save $22.12
  • RectorSeal condensate overflow shut-off switch with wiring

    RectorSeal 97695 Safe-T-Switch Overflow Shut-Off Switch SS-700-E

    SALE

    RectorSeal 97695 Safe-T-Switch Overflow Shut-Off Switch SS-700-E

    Regular price $55.00
    Sale price $55.00 Regular price $68.75
    You Save: $13.75
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $13.75
  • Packaged RectorSeal condensate overflow safety switch with wiring

    Rectorseal SS103E Condensate Overflow Safety Switch Control

    SALE

    Rectorseal SS103E Condensate Overflow Safety Switch Control

    Regular price $70.00
    Sale price $70.00 Regular price $87.50
    You Save: $17.50
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $17.50
  • MRCOOL stepper motor for 36k mini split system - efficient motor replacement

    MRCOOL Replacement Stepper Motors for 9k, 12k, 18k, 24k, and 36k Wall-Mounted Air Handlers

    SALE

    MRCOOL Replacement Stepper Motors for 9k, 12k, 18k, 24k, and 36k Wall-Mounted Air Handlers

    Regular price $59.74
    Sale price $59.74 Regular price $67.86
    You Save: $8.12
    Unit price /  per 
    ⚠️ Only 3 left in stock!
    Shop Now
    Save $8.12
  • MRCOOL replacement indoor blower motor

    MRCOOL Replacement Evaporator Blower Motor for 9K & 12K Advantage, Olympus & DIY Series Wall Mounted Air Handlers

    SALE

    MRCOOL Replacement Evaporator Blower Motor for 9K & 12K Advantage, Olympus & DIY Series Wall Mounted Air Handlers

    Regular price $212.18
    Sale price $212.18 Regular price $241.02
    You Save: $28.84
    Unit price /  per 
    ⚠️ Only 5 left in stock!
    Shop Now
    Save $28.84
  • MRCOOL replacement indoor blower motor

    Genuine MRCOOL Air Handler Blower Motor – Replacement Part for DIY-18-WMAH-HP-230A Wall-Mounted Unit

    SALE

    Genuine MRCOOL Air Handler Blower Motor – Replacement Part for DIY-18-WMAH-HP-230A Wall-Mounted Unit

    Regular price $194.67
    Sale price $194.67 Regular price $221.13
    You Save: $26.46
    Unit price /  per 
    ⚠️ Only 8 left in stock!
    Shop Now
    Save $26.46
  • RectorSeal condensate overflow safety switch with wiring

    RectorSeal 97637 Safe-T-Switch Condensate Overflow Switch 24V

    SALE

    RectorSeal 97637 Safe-T-Switch Condensate Overflow Switch 24V

    Regular price $39.00
    Sale price $39.00 Regular price $48.75
    You Save: $9.75
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $9.75
  • MRCOOL replacement indoor blower motor

    Blower Motor for MRCOOL Wall Mount Air Handler: DIY-12-WMAH-HP-115A, DIY-12-WMAH-HP-115AE, DIY-12-HP-WMAH-115B and DIY-12-WMAH-HP-115C25

    SALE

    Blower Motor for MRCOOL Wall Mount Air Handler: DIY-12-WMAH-HP-115A, DIY-12-WMAH-HP-115AE, DIY-12-HP-WMAH-115B and DIY-12-WMAH-HP-115C25

    Regular price $191.58
    Sale price $191.58 Regular price $217.62
    You Save: $26.04
    Unit price /  per 
    ✅ In Stock
    Shop Now
    Save $26.04
  • MRCOOL Ambient Temperature and Room Temperature Sensor for DIY-MULTI3-27HP230C 11201007003448 -

    MRCOOL Ambient Temperature and Room Temperature Sensor for DIY-MULTI3-27HP230C 11201007003448

    SALE

    MRCOOL Ambient Temperature and Room Temperature Sensor for DIY-MULTI3-27HP230C 11201007003448

    Regular price $54.59
    Sale price $54.59 Regular price $62.01
    You Save: $7.42
    Unit price /  per 
    ⚠️ Only 2 left in stock!
    Shop Now
    Save $7.42
  • 1
  • 2
  • 3
  • 4
  • …
  • 9

Need help sizing your system?

Our easy System Builder recommends the perfect system for your space in minutes.

Use the System Builder →
✓
Family-OwnedUSA Business
BBB
BBB AccreditedA+ Rating
▱
Fast & Free ShippingNationwide
☏
Expert SupportDIY Friendly
▢

Shop

  • Mini Split Systems›
  • Multi-Zone System Builder›
  • Central Ducted Systems›
  • Dual Fuel Systems›
  • HVAC Parts›
  • Accessories›
?

Support

  • BTU Sizing Chart›
  • Installation Checklist›
  • Electrical Requirements›
  • Line Set Length Guide›
  • Troubleshooting & Error Codes›
  • Warranty Registration›
▱

Learn

  • Single-Zone vs Multi-Zone›
  • 4th Gen vs 5th Gen›
  • What’s Included in a DIY Kit›
  • How to Size a Mini Split›
  • DIY vs Professional Installation›
  • MRCOOL Mini Split Series Comparison›
⌂

Company

  • About Us›
  • Contact Us›
  • Track Your Order›
  • Return / Refund Policy›
  • Shipping Policy›
  • Financing›
  • Start a Return›
☷

Programs

  • Pro Contractor Program›
  • Creator Partnership›
  • Motorsports Program›
MRCOOL DIY Direct

The #1 source for DIY mini split systems. Trusted by thousands of homeowners nationwide.

Get Exclusive Offers & Tips

Join our email list and be the first to know.

Follow Us

© 2026 MRCOOL DIY Direct. All rights reserved.

  • Terms of Service
  • Privacy Policy
  • Price Match Guarantee
  • MRCOOL Creator Partnership
  • Pro Contractor Program
  • Choosing a selection results in a full page refresh.
  • Opens in a new window.