Question about Intertherm P3RA-048K Air Conditioner

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Intertherm/nordyne furnace (24 years old)

Blower coming on when t-stat demands, but NO heat coming from furnace. Pilot is fine but burners do not ignite.

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  • 234 Answers

Shut off power, get a small wrench, remove orifice spuds and clean them with toothpick. Take burners out and clean rust from them. Check and see if you are getting 24 volts to gas valve. If not replace it.

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

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  • 306 Answers

SOURCE: furnace has does not ignite flame

how often do you replace your filter?

On the limit switch that protects your unit when it gets to hot the number one reason is dirty filter.

The pressure switch is located in the upper side of cabinet has a rubber hose connected to it. They very rarely go out though. So find your vent fan the first fan that comes on and follow the rubber hose to the switch.

Posted on Feb 11, 2009

  • 534 Answers

SOURCE: my intertherm furnace (old model) has recently

Your blower motor has several speeds to it and by the problem you are having it sounds as though the blower motor may be going out. The motor has a slower speed for the heating cycle and since you have the noise in the heating mode I suggest having the blower motor changed as soon as possible since it could cause other problems in the heating section of the furnace( possibly burning out the high limit switches). Good Luck on your repairs hope this helped

Dave

Posted on Oct 20, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: I have an old 1973 Mac 1199 Intertherm propane furnace

Replace the fan limit switch. It is sometimes mounted in the ductwork and sometimes just below the ductwork in the furnace cabinet. Note where the little arrows are pointing to on the temperature scale so you can set the new control to the same as the old. Usually this control is made by Honeywell and may have three wires going to it.

Posted on Oct 21, 2009

koolbreezes
  • 540 Answers

SOURCE: Intertherm furnace pilot won't light

There should be a reset button in the upper chamer next to the fan motor. In the middle ,push in on the center red button to reset it, this tripps because it says I,m not gettig enough air flow due to a plugged or dirty fliter located on the front cover or door.

Posted on Dec 18, 2009

heatman101
  • 43501 Answers

SOURCE: I have a intertherm electic

Hi,
Here is a tip that I wrote about troubleshooting those furnace blowers..

Hot Air Furnace - How to Troubleshoot the Blower


heatman101

Posted on Jan 22, 2011

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Thermastat and furnace


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