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An old vulcan cental heating system only blows warm air and very little pressure but there is heaps at the vacuum filter side

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Does full service ,ring a bell!

Posted on Aug 23, 2008

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Olds 98 regency


May be the filter it's capped or the avaporative panel it's capped too with fine dust. Clean de filter and check tehe avaporative panel an cleaned too. Or, if the a/c it's working with low pressure in sucction side , may be need more refrigerat. Check this, thoe pressure in low side is 65 psi. but if the pressure is lowest than this may have a little leak and need fix it..

Aug 24, 2014 | LG LP123HD3A Terminal Air Conditioner

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Heat blows little warm air


Check your filters and your indoor coil.

Dec 13, 2013 | Goodman Air Conditioners

1 Answer

Bought the cavalier had no ac/ but has great fan blowing it's just hot, defrost everything runs normal mulitiple speed////recharged w r134 blew ice cold almost 3 months went out again slowly. Stopped at...


I,t sounds like you had a leak, and pulled air into the system. This calls for professional servicing. Whenever there's a leak in a refrigeration system, air and sometimes other noncondensables get pulled into the system. They don't belong there. They cause heat and high pressure in the condenser, and will eventually destroy the compressor. The system needs dehydration and evacuation before charging. That's after all leaks have been repaired.

Aug 26, 2013 | Air Conditioners

1 Answer

How to clean front cover M7Q08FZA


Spray with kitchen degreaser with filter gauzes out but cover closed. Allow to soak for 10 mins. Brush with nylon brush (dustpan brush) or old toothbrush to get into all the crevices then rinse with warm water from a garden low pressure sprayer and vacuum dry with a vacuum cleaner. Refit filters and run to check

May 17, 2012 | Maytag M7Q08F2A Thru-Wall/Window Air...

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I own a coleman EB15B cental heat and air unit, it stopped working two days ago, I replaced the fan and a new motor but the unit still will not blow cold or hot air when I set the temperature. The unit has...


You need to make sure the compressor is running. If the compressor is NOT running , the fan will turn but there will be no cold air. If the compressor is not running, check all the wiring to make sure a wire is not burnt off. Pull the fuses before inspecting.
If the compressor IS running, you may be low on refrigerant. If you have a set of guages to check the pressure you can find out if it is low on refrigerant or not. If it is an older refig 22 system the low pressure side will read about 65 lbs on a 80 degree day. If you have no experience in this, you may need to call a service tech to check it for you.

May 14, 2011 | Air Conditioners

1 Answer

Cold air blows outside and hot air inside


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.

May 02, 2010 | Air Conditioners

2 Answers

My heat unit will not blow hot air unless we go outside and hit a button on the back bottom of the unit. Once we do that it will blow hot air for that cycle. when it is time for it to come on it is cold...


If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).

Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.

Nov 07, 2009 | Ruud Central System Air Conditioner

2 Answers

Blows air not cold I don't know how to tell if the compressor is dead or the thermostat


Hook a set of ac guages to the high and low side of your system and see what your pressures are. ballpark low should be 55 psi and ballpark high should be 350 psi. If off replace inline filter on high side, vacuum system and recharge with specified capacity and check pressures again. check to make sure clutch on compressor engages when you turn your ac on. if no charge in system clutch will not engage

Jul 29, 2009 | American Standard Air Conditioners

1 Answer

Model GSC130481AG, S# 0808548576 The common wire to the compressor rubbed through the wire insulation and melted a hole in the discharge line from the compressor. Upon loosing all of the refrigerant the...


You have a restriction in the system. Probably in the TXV or orifice in the A/H.
The burn out sent trash/fragments through the system. I would open the sytem and blow nitrogen through, then pull a deep vacuum.
You may need to install a low side filter/drier. When you open the system change out the high side drier again for sure.

Jun 26, 2009 | Goodman Air Conditioners

1 Answer

Intertherm electric furace


It sounds like the coils are fine if you are getting heat. They are likely shutting down from overheating after being on for awhile. Check your filter and overall air flow to make sure it's adequate.

Mar 03, 2009 | Intertherm P3RA-048K Air Conditioner

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