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Posted on Mar 09, 2011
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What happen when your hvac blows cold air and the heat is set at 73

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  • Posted on Mar 09, 2011
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Sounds like you have a thermostat problem. If your thermostat is not triggering the furnace to ON/HEAT you will not the heat you desire. IF you know how to trigger the furnace you could jump your furnace controller wires BUT DON'T do this. Instead, get another thermostat and try it. But be sure to get the same rated thermostat... take it with you when looking for a replacement.
Not sure about everything going on with your unit based upon what you provided but your thermostat should show the current temp and the temp you set. It also show the mode that the thermostat is in (HEAT / COOL / AUTO) Manually select heat, then increase temp above the current temp setting. listen for furnace to activate or wait a few minutes for warm air output. If not, you'll have to see assistance trom a local heating and cooling company.

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If your heat pump is blowing out cold air while the heat is on, it could be caused by a few different issues. Some common causes include:
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  2. Dirty air filter: A dirty air filter can restrict airflow to the system, causing it to blow out cold air.
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  4. Faulty reversing valve: The reversing valve is responsible for switching the flow of refrigerant between heating and cooling mode, if this valve is faulty, the heat pump could blow out cold air when the heat is on.
  5. Defective fan motor: If the fan motor is not working properly, it may not be able to circulate warm air through the ducts.
It's best to consult a HVAC professional to diagnose and fix the issue. if i was able to help my cashapp $ralphpapi thank you have a blessing day
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If you are saying this happens on a really cold night, the assumption is that on milder nights, it seems to work adequately.....If that's the case, there is a possibility that it is marginally sized in capacity to heat the space in which it is installed. If it has a "fresh air" damper setting, make sure that is closed completely, because that is air directly from outside the structure that is being brought in through the blower and adds more load to the space and makes the discharge air feel colder.
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