I have a Kenmore (Goodman) heat pump unit 7 years old. Approx. 2 years ago Sears changed some sequensors and I have had problems since. First of all they cut plugs off original wire harnesses, why I do not know. But now on heat mode when thermostat set at certain room temperature furnace will run and keep rinning forever after reaching set temperature unless I set thermostat down 2 or 3 detgrees manually. Also while running to reach set temperature it will sometimes drop 4 or 5 degrees befor reaching set themostat temp. Sears has looke at, but since they created this problem seem to be lost in reolving it. What is causing this problem?
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It really depends on the type of system you have. You will either have a furnace, high efficiency furnace, heat pump system, heat pump with gas or electric back up heat. All these systems operate differently and the problem that you are having could be caused by multiple issues, depending on which system it is. More info will be greatly appreciated. Make sure to check all filters and air flow first before going any further. The system could be over heating and tripping a limit, causing the system to stop producing heat until the unit has cooled back down.
I would guess that the fan off setting on your limit is set a little to high. If you have the manual you can see what it says about changing the running time for the fan after the burner has shut off look on the control board and you should see two switches,one to set the time for burners to fire before main blower starts and one to set time for fan to run after burners shut off. To help with the problem you are describing set fan run time up so fan wii run longer. Hope this helps. Thaks.
Hi, You are right. The outside unit starts quickly. The humming will either be the evaporator fan or the AC compressor itself. If you can reach into the evaporater fan with something narrow and stiff you may be able to see if the fan turns. Sorry for the trouble you are having. One or the other is trying but unable to start, hence the humming. Wayne
That does not sound normal at all, I have a Goodman Heatpump and the Fan on the Evaporator (outside unit) should run as soon as it starts up! The only delay you should be seeing is when the unit starts, the fan in the AHU starts 5 seconds after and runs for about 1.5 minutes after shutdown.
Sounds like your repair man ripped you off. He should have stood behind his work.
1. I would try to clean the flame sensor located just below the burners. It is connected to "one" wire (Not the two wire) clean rod with sandpaper.
2. The old and thermostat could have a had a bad heat anticipator. if the new t/stat is not digital the heat anticpator on the T/stat needs to be adjusted. slide the small adjuster arm under the cover to about .6 or .7 and see if the solves the problem. if the t/stat is digital it should be preset from the factory.
3. last resort have a service man check your pressure swith. could be a slow inducer motor, blocked or bad vacum line, or a restricted drain or flue pipe.
I would insist that Sears either have a Senior tech come out and fix it or return it to the state it was prior to them touching. Then call some one else. Have them involve the Goodman rep in your area.
sounds like the fan switch in the furnace is coming on and off. This is common for Goodman. or could be the heat anticipator on the t-stat. While there are several reasons this happens these are the most common.