FIX YOUR OWN HEAT PUMP OR AIR CONDITIONER

Quick Contacts

Submit a question :
We are happy to help!

Talk To An Expert

Grainger.com

My Thermostat doesn't work!


Thermostat blank? A/C won't cool? Heat Pump won’t heat? Don't worry, you've come to the right place! However, it probably isn't the thermostat's fault, as our name might suggest. If you have some basic skills with hand tools, and would like to take a stab at diagnosing (and maybe even fixing) your problem, read on!

First of all, take a look at our disclaimer. Then, check out our troubleshooting section! You can also contact us via email, Instant Messenger (heatpumpmechanic), Skype, or phone.


Give us a try!


If we determine that you need parts, we can help you find them or you can purchase them from us. We can buy parts wholesale at a vendor in your town (or nearby) and you can pick them up, or we can ship them to you. We can get parts for air conditioners, heat pumps, and furnaces made by Trane, Carrier, Bryant, Comfortmaker, Heil, ICP, York, Nordyne, Amana, Whirlpool, Goodman, Lennox, Ruud, Rheem, Armstrong, Coleman, and more! All you have to do is pay for the part and go pick it up. No shipping, no waiting! If you would rather have us ship you your parts, orders made before 4:00pm Eastern Time will ship the same day.


Troubleshooting


This site features troubleshooting instructions for Single-Speed Split-System Heat Pumps. If your system is a Geothermal Unit, a “Communicating” System, or if it includes a Gas or Oil furnace, then we do not yet have written troubleshooting help for you. Many of the major components are the same, but the controls and troubleshooting procedures can be different. You may still contact us and work with our skilled technicians to resolve whatever issue(s) you may be having.

Troubleshooting and repairing your own heat pump involves working with live electrical circuits and high-pressure refrigerant. Before you begin, please read our disclaimer .

To begin, click on the Troubleshooting menu above, and look at the items on the drop-down list. Choose the one that most closely resembles your situation. If you have an unusual situation that is not represented here, please contact us; in most cases we will get back to you right away.

If you are a beginner, check out our multimeter page. You will need to know how to take some basic measurements using a Volt Meter, an Ohmmeter, and an Ammeter.