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Old 02-03-2020, 10:16 PM   #16
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Re: Does not blow warm or hot air at all


It runs with AC on, but not sure when it turns on the heater.


I can check tomorrow morning when it is cold enough!
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Old 02-03-2020, 10:18 PM   #17
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Re: Does not blow warm or hot air at all


i just checked and it does not work!
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Old 02-03-2020, 10:22 PM   #18
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Re: Does not blow warm or hot air at all


Id start by reviewing the settings in the thermostat. You very well could have it set wrong.
Then move on and test the electric heat.
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Old 02-03-2020, 10:25 PM   #19
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Re: Does not blow warm or hot air at all


If you set the thermostat to emergency heat, do you get hot air?

emergency heat bypasses the heatpump and turns on the elements. I don't recommend running it like this for long, just to test the elements and get heat until you can resolve the issue.

With the stat calling for heat in normal heat mode, on the terminal strip inside there should be 24v between terminals Y and C.

If there's power there, you have to open up the outdoor unit and see if it's getting line voltage and low voltage.

Line voltage - 240v to the contactor and low voltage to the defrost board.

In heat mode -> 24V AC between R and C, C and Y.

If that checks out, a refrigerant pressure switch is likely preventing it from running due to loss of charge. (there are other potential causes of this and we can walk you through further troubleshooting once the basics are checked)

If it's out of refrigerant, need professional repair and likely not worth it on a older R22 heatpump.
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I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
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Old 02-03-2020, 10:28 PM   #20
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Re: Does not blow warm or hot air at all


I do not have ememrgency heat option on my thermostat, Can I just jump the cable to diagnose the element?
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Old 02-03-2020, 10:29 PM   #21
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Re: Does not blow warm or hot air at all


I don’t think you have the right thermostat. What’s the model number?
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Old 02-03-2020, 10:30 PM   #22
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Re: Does not blow warm or hot air at all


honeywell tth2410b
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Old 02-03-2020, 10:31 PM   #23
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Re: Does not blow warm or hot air at all


oops rth2410b
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Old 02-03-2020, 10:36 PM   #24
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Re: Does not blow warm or hot air at all


That thermostat says it’s compatible with heat pumps with auxiliary heat but not heat pumps with emergency heat.
I don’t think it’s the proper thermostat for the job.
You’ll have to get into the programming menu and verify settings.
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Old 02-03-2020, 10:37 PM   #25
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Re: Does not blow warm or hot air at all


Those hardware store thermostats don’t last too long. I much prefer the Honeywell professional line such as the VisionPro and FocusPro lines.
You’ll not want to adjust setpoint with a heat pump.
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Old 02-03-2020, 10:56 PM   #26
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Re: Does not blow warm or hot air at all


The better rth ones are very decent - this one looks pretty cheap.

this stat can be set up right for heatpump though definitely not what i would recommend.
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Old 02-03-2020, 11:02 PM   #27
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Re: Does not blow warm or hot air at all


I found this pictures that I took before replacing contactor and capacitor.


The case was loosen and many screws were missing.


I do not think the area of the picture shouldn't be that dirty, so I cleaned but I realized board was pretty bad.


Can the defrost board cause the problem?


I will check tomorrow again see the LED light!
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Old 02-03-2020, 11:07 PM   #28
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Re: Does not blow warm or hot air at all


you're getting ahead of yourself - need to see if the stat is working properly.

follow my instructions - checking at the air handler terminal strip.
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Old 02-03-2020, 11:08 PM   #29
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Re: Does not blow warm or hot air at all


where is your instruction?
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Old 02-03-2020, 11:21 PM   #30
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Re: Does not blow warm or hot air at all


"With the stat calling for heat in normal heat mode, on the terminal strip inside there should be 24v between terminals Y and C.

If there's power there, you have to open up the outdoor unit and see if it's getting line voltage and low voltage."

-->u can start at the outdoor unit and work your way back but i would start at the air handler.
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