Question about Amana PTH153B50AJ Heat Pump Air Conditioner

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My ptac is not blowing hot air only blows warm air

Its cold outside now and alot of my ptac units only blow warm cool air, instead of blowing hot air. what can be the problem?

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Freon is low or outside is very cold

Posted on Dec 04, 2009

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Posted on Jan 02, 2017

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Hot or warm? Sound like float switch shuts compressor off. Vacuum the drain and clean the pan

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It sounds like your freezing up at the coil, which in turn, blocks airflow across coil and only a small amount of air comes out of the vents. This also explains the cold air coming from fan on the outside unit, since the system cannot absorb the heat from the inside of the house through the coil. Your air outside is usually blowing out warm to hot air because thats the heat it rejects out of your system. I would turn the thermostat to "OFF" and turn just the fan setting to "ON" instead of Auto, this thaws the system out faster. Give it time to fully thaw, make sure filters are clean, and check airflow. If airflow is back to normal, your problem is more than likely the charge of refrigerant. If you have to call a technician out, make sure the unit is not frozen at all before they get there, they would not be able to do anything with the system froze. Hope this helps and good luck!

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Make sure it is in cooling mode. Sounds like you may have a problem with the reversing valve but you would want to check the pressures in the system first and make sure the charge isn't low.

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It sounds like you have a unit called a heat pump. When a heat pump unit is in cooling mode the outside unit blows hot air and the inside unit blows cold air. If the outside unit is blowing cold then the indoor unit is most likely blowing room temperature or warm air. It sounds like the thermostat could be controlling incorrectly or you could have a failed reversing valve which is the device that switches the unit from heating to cooling mode.

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Ac BLOWING HOT AIR INSTEAD OF COLD. All of a sudden my AC started blowing hot air instead of cold. It is set on cool.


Check to see if your outside unit is running. If not, check the breaker. If it is running you may have an issue with the reversing valve. It looks like three lines coming out of the top and one on the bottom. Trace the wires back to see that they are tight and secure. Of course, TURN OFF THE POWER first. good luck.

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Sound like air flow problem to me, the inside and the outside. check the inside filter to see if it's clean and clean the outside condenser coils by washing it.

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Some units do cool/dehumidify only im afraid why cant you let the unit dump its hot air into the room then it wont heat or cool the room?

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