Question about Heating & Cooling
Lennox Heat Pump- M/N 12hpbz4-4p Excuse me for waiting so long to find solution for problem but I tend to procrastinate. This problem has gone on for a year or so. Cold weather now and the heat pump sometimes makes a loud click when turning on and off. Also, when the air handler comes on inside, the heat pump does not always come on. Instead it makes a loud hum but fan does not switch on.Eventually it does. Twice I went out and shook it and fan came on but i am not sure if it was going to come on anyway and that was just a coincedence. I called Lennox today and to see if I could talk to a tech but could not get past receptionist. She told me that outside unit should come on at same time as inside air handler. Is this true?
Had it serviced last week. Repairman took out indoor coil (which was filthy) and cleaned it outside with solution. Also cleaned outside coils with solution. Heat pump would not make noise of course and fan came on with him here but it was also a warm day if that matters. He turned it on and off a few times. Said he thought it was going to be the contacts, but he said if it was then they would of made noise while he was here and they usually go out for good. He is hinting that it might be motor but when it runs, it sounds great and he did not say anything like it sounded like it was going bad. As mentioned the clicking noise and fan not working while it hums happens often but not all the time. Not sure if I am imagining that it happens more in colder and warmer weather or just happens that I am outside and happen to hear it.
Yes the start capasitor starts the fan motor and the contactor pulls together when the t-stat tells it to start and it has a spring in it that gets week , some brands of units have a delay in the outside units board to stop it from starting at the exact same time as the airhandler
Posted on Jan 08, 2009
I have a problem with getting my heat pump to come on. Sometimes it will be just fine and other times the green light on the thermostat will just keep blinking...and then at times it will finally come on and about 30secs later shut off without a temp change...Could this be my thermostat going bad??
Posted on Dec 13, 2009
The pump (compressor) runs in the same direction all of the time. If it has a clicking sound and hum then the motor is not starting. It is then either the starter relay or more likely a start capasitor,if the unit has one . I hope I have explained well. I also concure that the compreassor shoudl be running when the air handler is on .
Posted on Jan 08, 2009
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Posted on Jan 02, 2017
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