Miller Thermostat Manual
With this heat pump troubleshooting guide, you can diagnose and repair the most common problems in a residential heat pump system. Most of the checks can be performed with common household tools and a little bit of basic knowledge. (You provide the tools and we will help with the knowledge.) This guide is for units that are connected to an indoor air handler and transfer the heat through a duct system. The typical service call will cost you over $100. With the help of this guide, you can do your own heat pump repairs and keep that money.
**NOTE** ONLY YOU CAN ASSESS YOUR ABILITY TO PERFORM THIS TASK. THIS IS A GUIDE AND CANNOT PROVIDE ALL OF THE DETAILS FOR EVERY SITUATION. Before troubleshooting begins, it is important to ensure that the has been performed on the system. If the routine maintenance has been done, it is time to find the problem. A heat pump has two basic modes of operation and the steps to diagnosing a problem are a little different. When troubleshooting in the, the process is basically the same as diagnosing and repairing a ducted central air conditioner. Does the unit provide any heat?
Miller Thermostat Manual
Miller Thermostat Manual
If your system is not providing any heat to the home, then you can begin your heat pump troubleshooting at the thermostat. Ensure that it is on heat and set above the room temperature.
If you have a digital thermostat, then set the desired temperature to about 2-4 degrees above room temperature. This should make only the heat pump part come on and not the backup electric elements. (If you do not have a digital thermostat, we would highly recommend.) Now, turn the fan switch to on.