Question about Intertherm P3RA-048K Air Conditioner

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Hvac systems my air isnt blowing very well so i turned the furnace from auto to on it is blowing now but it still isnt cooling the house what might my problem be

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1. Check and/or replace the filter in the air handler

2. Make sure all vents are open and not blocked

3. System may need inspection and charge

Posted on Oct 17, 2007


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Posted on Jan 02, 2017


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Keeping your whole home cool with central air.

Sometimes it is difficult to keep your home cool in the hot summer months. Also, some areas of your home may still be hot where other areas are too cool. Try this method to keep your home cool evenly throughout. Before you get started make sure your furnace filter is new. This will allow for maximum air flow.

If your living space is a single floor plan:

  1. Turn the air conditioning on
  2. Switch the furnace fan from auto to on.
  3. Measure the temperature in each room.
  4. Close the vents by about half in the cooler rooms
  5. This will force more cool air into the warmer rooms.
  6. Keep adjusting the vents until all the rooms have the same temp.

If your living space is on more than one level:

  1. Turn on the air conditioning.
  2. Switch the furnace fan from auto to on.
  3. On the lowest level of the house close half of the vents that are the closest to the stairs.
  4. This will force more cool air to the top floor where it is usually hotter.
  5. Cool air will sink from the upper floors which will keep the area near the stairs cool.
  6. Measure the temperature in all the rooms.
  7. Keep adjusting the vents until you have a nice even temperature throughout the house.
I found that leaving the furnace fan on all the time will keep your home evenly cool and comfortable. You may have to replace your furnace filter once a month due to the increased air flow. It will be well worth it in a cooler, more comfortable, and more energy efficient home.

Take Care,


on Aug 09, 2010 | Heating & Cooling

1 Answer

What's your problem? I have a Airtron furnace/air cond unit and last night I smelled a odor that of something electrical burning. I also noticed that the heating unit stayed on and continued to blow...

I'm willing to bet a relay burned up. You likely have your tstat set to auto changeover, meaning it automatically goes from heat to cool to maintain desired set points??

Jun 21, 2017 | Heating & Cooling

1 Answer

What happen when your hvac blows cold air and the heat is set at 73

Sounds like you have a thermostat problem. If your thermostat is not triggering the furnace to ON/HEAT you will not the heat you desire. IF you know how to trigger the furnace you could jump your furnace controller wires BUT DON'T do this. Instead, get another thermostat and try it. But be sure to get the same rated thermostat... take it with you when looking for a replacement.
Not sure about everything going on with your unit based upon what you provided but your thermostat should show the current temp and the temp you set. It also show the mode that the thermostat is in (HEAT / COOL / AUTO) Manually select heat, then increase temp above the current temp setting. listen for furnace to activate or wait a few minutes for warm air output. If not, you'll have to see assistance trom a local heating and cooling company.

Mar 09, 2011 | Goodman Heating & Cooling

1 Answer

My heater blows cold air why? I have a REAB 1010s need manual

Check your thermostat to see what your fan switch is set on. There should be two settings - auto and on. If it is set on auto, the fan only comes on when furnace runs. If the switch is set on on, the fan on your furnace is running all the time. Which means when temperature in the house reach what you have set on your thermostat, the furnace kicks off, but the fan keeps running and blows cool air. Some people run their fan all the time, especially if they have allergies, because that's a good way to clean the air.

Jan 02, 2011 | Heating & Cooling

1 Answer

I have a rheem hvac unit that is not cooling the air that is blowing into my house. The air feels like it is the same temperature as the air outside.

the compressor isnt running you would need to check capacitor maybe not enuff freon how does your filter look

Sep 11, 2010 | Heating & Cooling

1 Answer

My furnace heats the house well, but during the cool down it actually blows cold air dropping the temperature causing the furnace to re-ignite. How do I adjust? Goodman - GMS9/GCS9

Depending on the age of the furnace you may be able to adjust the cool down. On some furnaces there is a silver box usually made by honeywell. This is your fan limit control. If you take the cover off you will see a dial with different temperature settings with 3 pins in a grove. The first one is fan on with temperature rise this turns the blower on when the furnace starts and warms up. The second is the fan off after furnace shuts down, this would be the one you want to adjust to a higher temperature to keep the blower from blowing cold air. The last pin is the high limit if the furnace gets to this temperature it will shut the furnace off but keep the blower running. Make sure that the thermostat fan option is set to auto and not on.

Jan 02, 2010 | Goodman GMS90703BXA Heater

1 Answer

Day / Night HVAC is running cool air BUT the furnace is running 2

Strange. Does the thermostat control both the air conditioning units and the furnace. If not make sure the furnace thermostat is turned down to below 65 degrees.

Jun 29, 2009 | Honeywell Programmable Thermostat Heater

2 Answers


I would check furnace filter first. If that looks good i would check the thermostat. To check thermostat turn power off to furnace then take thermostat off the wall and connect wires labbled R & W together then turn power on and check furnace to see if it runs for more than a couple of minutes. If so install a new thermostat. If that doesn't work let me know and i can give you a couple more thing to try.

Jan 17, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Hvac system

Sounds like you have frozen up. Turn your system from cool to off and your fan from auto to on. Let it run for an hour or so. If blowing seems to be normal again, you may have a duct problem, dirty coil problem, or a low on refrigerant problem.

Oct 17, 2007 | Intertherm P3RA-048K Air Conditioner

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