Where To Buy The Original Or Compatible Solenoid Coil For My Heat Pump? - HVAC - Page 3 - DIY Chatroom Home Improvement Forum
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Old 07-22-2020, 04:06 PM   #31
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Re: where to buy the original or compatible solenoid coil for my heat pump?


No, there is no communication to speak of.
It’s basic electrical inputs.
And the air handler is the voltage source. The thermostat handles start/stop duty. Save for the defrost control board in the outdoor unit.
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Old 07-22-2020, 04:18 PM   #32
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Re: where to buy the original or compatible solenoid coil for my heat pump?


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Originally Posted by roughneck View Post
No, there is no communication to speak of.
Itís basic electrical inputs.
Yes, you are right. I should say "connect", "electrical signal".

Quote:
Originally Posted by roughneck View Post
Save for the defrost control board in the outdoor unit.
"Save for ", what does this mean?
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Old 07-22-2020, 04:24 PM   #33
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Re: where to buy the original or compatible solenoid coil for my heat pump?


The defrost board can turn the electric heat on when the unit goes into a defrost cycle.
However, the control voltage for the outdoor unit comes from the air handler, and not the disconnect outside.
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Old 07-22-2020, 04:41 PM   #34
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Re: where to buy the original or compatible solenoid coil for my heat pump?


The transformer provides 24V to the system. Is it possible that the transformer is bad and causes the fuse blowing? The service guy caused a short once in the indoor unit. That short may cause damage to the transformer or other related parts?
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Old 07-22-2020, 05:23 PM   #35
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Re: where to buy the original or compatible solenoid coil for my heat pump?


Probably not.
Definitely not, if your suggesting replacing the transformer to see if the problem goes away.
Sounds like your service guy is better at causing problems then fixing them.
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Old 07-22-2020, 05:45 PM   #36
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Re: where to buy the original or compatible solenoid coil for my heat pump?


If the transformer was bad, it would burn itself up.
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Old 07-22-2020, 07:29 PM   #37
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Re: where to buy the original or compatible solenoid coil for my heat pump?


If the outside unit is power off, do these 24v wires connected to it still work? if not, then that 24v control board will have much less workload or chances to be blown. Am I right?
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Old 07-22-2020, 07:44 PM   #38
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Re: where to buy the original or compatible solenoid coil for my heat pump?


No, that is not right.
The indoor board isn’t the problem.
As we have said previously, the 24V circuit is powering the outdoor unit irregardless if the high voltage power is on or off.
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Old 07-22-2020, 08:55 PM   #39
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Re: where to buy the original or compatible solenoid coil for my heat pump?


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If the outside unit is power off, do these 24v wires connected to it still work? if not, then that 24v control board will have much less workload or chances to be blown. Am I right?

Doesn't matter if the outdoor unit is turned off or not. The thermostat still sends out the control voltage to it, which originates from the indoor unit.


The indoor unit supplies all of the low voltage, the outdoor unit doesn't provide any low voltage itself.
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