Question about Carrier Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: dometic roof air
Sounds like the unit either has been miswired from the beginning or there is a stuck contactor relay.
The more rare scenario is that the control wire between the t-stat and the contactor is shorting to a power source causing the relay to energize. Good Luck!
Posted on Jun 23, 2008
problem is not the thermostat, thermostat is an on-off switch that happens to work on temperature. Your furnace is locking out. cycling the heat off switch resets the micro-processor in the furnace. You need to diagnose the problem in the furnace, to go further we will need the model and approximate age of the unit
Posted on Dec 18, 2008
SOURCE: Honeywell Thermostat RTH 7500
In some cases the fan will keep running to remove all the heat from the heat exchanger.It can be set to run shorter or longer.You might check that out.
Posted on Mar 19, 2009
You have a voltage bleed somewhere or a short, whatever you want to call it. Do you have a control board on this unit where the relays are integrated into it or do you have the old type where the relay is separate? Anyway, you need to take a meter and take voltage readings to the motor when it's acting up and when it's running right. I have had the same problem with a Goodman unit before and it turned out to be the tstat! What I would do is remove the cover off the tstat and take a small jumper wire and touch the r terminal to the y terminal. If the motor starts right up, you know it's the tstat. If you have the same problem, then the only thing it can be is a low voltage short to the unit from the tstat, bad control board if you have one, or a bad relay. But if the unit is working fine in heat, it's probably not the relay. I hope this helps.
Posted on Apr 09, 2009
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