Question about Heating & Cooling
How to clean the sensor in my home heating and ac unit, (Haier hvac HG80A1004.
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Posted on Jan 02, 2017
SOURCE: ROOF AC UNIT ISSUES
Ice on the coil is caused by 3 things; 1, low freon charge. 2, inadequate air flow across the coil, this can be a filter or dirty coil (I think you addressed these) or the fan isn't blowing enough air over the coil. 3, the unit is running continuously. A heat pump has another cause, that is something defective in the defrost system, like the sensor, reversing valve, control board or relay. If the breaker is tripping its because the compressor is over amping. There can be an obstruction blocking the fan or something like #2. Or the compressor is going out. If the breaker doesn't trip on other settings, like cool, but trips on heat, then I would look at the airflow.
Posted on Mar 14, 2008
If you have a Gas furnace in the Attic then the answer is yes. The outside condenser will not run if in fact you have a gas furnace.
Posted on Feb 12, 2009
the unit may be drawing the cool air it just released back into itself,plus the air close to the unit may be a little cooler than the air in the rest of the room.
Posted on Mar 19, 2009
Wow, about the only thing you have not looked at is the thermostat. Have you had the gas pressure tested? Next time it quits, Ohm out the gas valve to see if it has a bad coil. I have in the past put on the gas valve one of thoes light probes and had to watch it to see when power went out. I found out it was a bad circuit board. Hope this helps.
Posted on Jan 13, 2010
Testimonial: "Thanks for the tip. I'll try it and see if that helps."
Make sure filters are clean . if they are stopped up the unit will over heat. Lets start there. Russ
Posted on Mar 23, 2010
Testimonial: "James, YOU DA MAN!! I would have never guessed the filters could cause these symptoms. Recent carpet cleaning may have added to filter clogs."
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