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Unit is freezing up outside and in order to heat it has to be on auxillary heat... freon has already been checked we have had problems with the unit in the winter and summer months only 3 years old

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Posted on Feb 08, 2010

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2000 NISSAN 4X4 P/U A/C SYSTEM WILL BLOW COLD WHEN OUTSIDE AIR TEMP IS COOL, WHEN HOT OUTSIDE AIR BLOWS HOT.


your auxillary fan is not working. this fan is responsible for cooling the freon that is being circulated in your cooling system... check if there are any loose wires in front of the engine bay.

the auxillary fan is located right beside your radiator fan.

May 17, 2012 | 2000 Nissan Frontier

1 Answer

Mod# PTH093A35AC: Unit has quit running. Blower appears to be frozen up. Prior to non-functioning it was making a loud clicking sound while running in heat mode, almost like coils were freezing up....


yes the blower can be replaced / not all that difficult have a screw gun ready though...several screws to gain access.... the unit normally comes as a sealed system (meaning no actually service ports to add freon but can be ported and a tap added to check and add refrigerant to system... these heat pump systems are great when working correctly ,but when it does drop below 20-25 degrees outside they will start to freeze as the defrost cycles in them are normally not very long and the unit cant keep up so in return they will start to freeze up, however if the blower motor started to go out and unit was running it will freeze up on you.... hope this info helps out feel free to repost with anymore questions you may have.....

Feb 11, 2011 | Amana PTH09 Air Conditioner

1 Answer

Hello, I have a split level Samsung AC unit. Recently the outside unit formed ice on it, so i had a tech look at it and he said that it was freon low level prob, so we got the level back up and it ran for...


Yes it is! These are sealed systems, so if the tech made no effort in locating your leak, it will continue to loose freon. We are required by the E.P A. law, to make every effort we can to locate the freon leak. We can get away the first time, but always check for any signs of leakage. How much freon did he add? Should say on the service order as we charge by the lb. Look on the data plate on the outdoor unit to see what it holds, and compare how much was added. The compressor is working overtime trying to keep up. I would schedule a leak check to take care of the problem. They will not let us keep coming out to add freon with out finding the leak, its changed so much do to our o-zone layer. Please rate me on my help to you.
Shastalaker7
A/C, & Heating Contractor
The E.P.A. keep records of our freon use, and where it goes.

Jan 21, 2011 | Heating & Cooling

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Heatpump r-22 rudd system,unit runs starts out heating then compressor stops in middle of heating ,this unit has a out side air temp. sensor just wondering if possible bad board or not


If compressor stops in middle, check the following.
1.Thermostat setting must be minimum +3 degree than your room temp
2. Check it's in heat "mode"
3. Check indoor and outdoor coils are clean.
4. Check fan motor is working alright.
5. Outside sensor and room air sensor is placed correctly.
6. Gas pressure is o.k
7.Check compressor is overheated, even all the above is o.k.

Jan 12, 2011 | Ruud UAPA024 Air Conditioner

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Unit set to heat but outside unit fan won't turn on. Outside temp is below freezing. The weird thing is that you unit is putting out heat and not set to emergency heat


If it is a heatpump, the outside unit should not turn on below 35degrees or so. Below that temperature, the unit cannot effeciently exchange heat. When the outside temperature is low, the system automatically switches over to auxillary heat which uses the same heating elements as emergency heat.

Jan 11, 2011 | Ruud Heating & Cooling

1 Answer

2 month long issue...RUUD Achiever 1.5 Ton 10 Seer Heat Pump


Rather than have him replace the control board first, ask him to remove all the freon and weigh it. He then can reuse the Freon that came out of your system put back in at the exact charge that the rating plate calls for. He will add a bit more to compensate for any length of refrigerant lines from the outside unit to the inside unit. Now this will bring us to factory specs. If the unit continues to act up, then try another board. I am not a big fan of replacing parts unless other alternative ways have been tried. If he is not willing to try what you ask, why is he there? As far as if something is taking out the control board, have him clean and reconnect all ground connections and inspect the thermostat connections both on the inside unit and the outside unit. Is lightning a factor in your area?

Mar 11, 2010 | Ruud Matching Split Air Conditioner

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I have a heat pump and it freeze up


If you are referring to the outside unit freezing up, the issue is in the defrost cycle. The defrost cycle works something like this: The unit reverses the flow of freon causing the inside coil to blow cold air into the conditioned space and the outside coil is now working like an a/c unit, it gets warm to melt the frost/ice. The inside unit electric heat strips come on so you do not notice the cold air being blown in. The fan on the outside unit stops running to allow the coil to get good and warm.
Now the unit should go into the defrost cycle every 90 minutes or so. It should not terminate the cycle untill the coil is clear of frost. There is an "Klixon" type termostat that measures the temperature of the outside coil. This is most likely the problem. It is prematurely terminating the defrost cycle. I'd start there first.

Hope this helps, Let me know if I can be of any further help.

Dec 29, 2009 | Intertherm P3RC-030K Air Conditioner

1 Answer

My unit has been running all day. set on 75 degrees and still only 65 in the house


If this is a heat pump depending on the outside temp. it may not bring the temp. up. It is really not efficent to run a heat pump below freezing or near freezing.I suggest running the Auxillary electric heat if. Most heat pumps have auxilarry back up electric heat banks installed in them.

Dec 26, 2009 | Heating & Cooling

1 Answer

Central air unit two part system, inside and outside. Freezes


If coils are clean and blower is working properly,
then you're probably low on freon.

Jun 09, 2009 | Goodman GMS90703BXA Heater

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