Question about Intertherm P3RA-048K Air Conditioner

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The unit comes on but the fan does not .....sometimes it works sometimes it won' also freezes up occatiobe the heat sequencernally. i was told it might

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Need to replace fan motor

Posted on Sep 08, 2010

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Concept 1000 ac unit. Fan comes on but no air come into the house and the line freezes outside next to the unit. I'm lost!

Check your indoor air handler unit. If the coil is frozen, it is usually one of two problems. You are low on freon, or your filters are clogged and not allowing enough airflow over the coil.

Mar 20, 2017 | Heating & Cooling

1 Answer

Inside fan is working but heat exchanger ices up and fan freezes and unit won't cool.

This means the heating eliments are not coming on. Usually in this case I change out the heating timer, eliments, and thermostat. All as a set.

Aug 29, 2015 | Haier HRT02WNC 1.7 cu ft Compact Counter...

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I have a york diamond 80 heater. The part that blows the heat out won't come on.. igniter lites and flames come on but blower doesn' we are freezing

Sounds like your fan switch is defectiveor posibble installed in the wrong place. This switch is heat controlled and delays the fan coming on until there is warm air to blow.

Dec 31, 2012 | Heating & Cooling

1 Answer

I have a new ptac that won't cool, why?

The condeser fan blade is broken. I work at a place where 75% of these units have cond. fan broken in same place.

Mar 22, 2012 | Amana PTH123B25AJ Heat Pump Air...

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Compressor keeps freezing. Then I turn it to fan and it blows tiny bits of ice out the front.

There are two major reasons an air conditioner 'freezes up.'

#1 - low on freon

This is really "not likely" - especially if the unit is fairly new and has never been 'opened up.' By 'opened up' I'm referring to a procedure where 'valves' are installed in the system: usually welded, although a less desirable way to do the same - involves a self-piercing valve that is screwed into the line.

#2 - and the 'more likely reason' for the unit to freeze up - is "lack of air across the evaporator coil." The evap coil is the one where 'cool' air comes from.

Note: you should make sure all the ice is off the unit, so, you need to run it for a good while on 'fan only' to insure all the ice is gone and you are starting with a fully defrosted unit.

a) check the filter (in front of the evap coil) and make sure it's clean. Sometimes just a dirty filter can cause the unit to freeze. Remember - the idea is to allow air to flow across the evap coil.

b) if the filter has been changed often and is 'clean' then you're probably chasing rabbits here - "but" if the filter was "dirty" it's a good bet that the coil will be dirty and you should make sure you 'clean' it real good. Once you've cleaned the filter and the coil - the unit should quit freezing up.

#2A - also involves 'air flow' and is a 'far less possibility' but still - it's possible - so I will tell you about it.
Sometimes 'motors' will start to break-down (electrically) from age or whatever. Usually the bearings (which can't be oiled anymore) will start to wear causing the fan motor to 'heat up.' When the motor 'heats up' it will cause the amps to rise and eventually the 'internal overload' which is in the motor will 'open' causing the motor to "stop." When the motor stops - air flow stops and the unit will freeze. The interesting thing and a sometimes troublesome thing from the Service Tech's veiw is - that once the motor cools off - the internal overload will 'reset' and the motor will come back on and unless someone is there to see this happen - it's always in the background of the Service Tech's thinking, i.e. is the motor cycling "on and off" on the internal overload. Like I said - this is such a rare occurance that it doesn't come into play much - but hey - it does happen - so if your coil and filter were clean - you might watch the unit and see if the motor (fan motor) is going off.

hope this helps

Jun 12, 2010 | Heating & Cooling

1 Answer

Blower fan will not come on when set on Auto in heat mode.

the fan is controlled by a fan center or a stack switch. as burners light and heat up the spring sensor on the bulkhead above burners heats up and turns and a a point energizes the indoor fan if it gets to hot the burners go out on safty. sounds like a fan control is bad tap on them gently and they sometimes break loose but if not then have a pro replace fan control and test heat exchanger.

Oct 24, 2008 | Ruud UBHC Air Conditioner

1 Answer

Ever hear of this odd problem?

Sounds like the main circuit board. Get the freon level up to spec and if you can live for now with the inducer fan issue, let it ride. It will fail at some point.

May 18, 2008 | Goodman GMS90703BXA Heater

1 Answer

Heating problems

It sounds like the unit is going into a defrost cycle, which is normal for heat pumps and means all is working ok when it gets around 35 or colder they start to do this more often when the red light goes back off , the outdoor fan should come back on. You may also notice steam (may look like smoke) coming from outdoor unit. Is that what happens??

Jan 15, 2008 | Intertherm P3RA-048K Air Conditioner

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