Question about Intertherm P3RA-048K Air Conditioner

2 Answers

Intertherm Furnace Will not stay on

I have had to hit the reset button for it to heat. Now, I have a blinking light that indicates ''Limit Circuit Open or External Load on W.'' What does this mean?

I have had several problems with this furnace. Every year it seems we have to replace a part or two.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 67 Answers

Dirty air filter low air flow causing high temp in fire box to trip limit switch or fan motor

Posted on Jan 07, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 70 Answers

Possible dirty air filter low air flow causing high temp in fire box to trip limit switch or fan motor is bad hope this help let me know if you if this solved problem I may need more info

Posted on Jan 04, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Where is the limit switch on an Intertherm M1MB070ABW furnace?


it would be a safety switch up by blower assembly. typically has red reset button.

Apr 26, 2015 | Intertherm Air Conditioners

1 Answer

Flame sensor


Chances are there is a problem with the heating circuit. The blinking light is representative of identifying a problem. Look on the panel to see if it explains what each blink means.

A system that has a problem with the heating circuit will always bring the blower on and it will run continuously until someone turns it off.

Also check to see if there are safety high limit reset button on the unit that can be pressed to reset. Some manufacturers install them to alert you to a problem that needs to be corrected.

Mar 16, 2014 | Coleman Air Conditioners

2 Answers

Furnace will not kick on


going out on high limit which requires manual reset

Dec 15, 2013 | Intertherm P3RA-048K Air Conditioner

1 Answer

Intertherm mmha070


Hi, did he bypass the high limit to see if it was bad? Sounds like you are getting false codes and you have a problem in your module or main board, which ever you have. The way it is acting, saying the high limit is open but the tech says its not, I would change the board.
Shastalaker7

Nov 14, 2011 | Intertherm P3RA-048K Air Conditioner

1 Answer

Furnace has begun to fail to cycle on when shuts off but if switches on base of furnace are switched off and back on will cycle on until desired temp. is reached but will not come back on unless switches...


This sounds like it may be a control board issue. If the thermostat has been changed, and the unit operates correctly after it has been reset, then I am thinking the circuit board in the unit is faulty. When the unit stops working, check for a blinking or steady red light on the circuit board. Alot of the time this will be on or blinking and there will be a legend that tells you what each light stands for. This can help you troubleshoot the issue.

Mar 01, 2011 | Intertherm Air Conditioners

1 Answer

My furnace the burners light and come on and heat up the unit. But the fan never kicks on and blows. The fan itself works because I can turn it on manually so I know it's not that. The trouble code...


The manual selection on the thermostat bypasses the fan relay. When in Auto, the fan relay turns on the blower. You are probably looking at replacing the circuit board. As far as the three blinks, on the reverse side of the front panel there is a wiring diagram and error code chart. It will give you a starting point where to look for a problem. The three blinks could indicate an open limit because the blower is not operating. Keep the blower on manual and let the furnace run normally until you can figure out what the problem is.

Feb 23, 2011 | Intertherm Air Conditioners

1 Answer

Heater kicks on and off after heating.


The blower may cycle on and off to cool the heat exchanger. The fan limit still senses the heat after the furnace shuts off and the limit goes up the same as when the furnace first starts. You could adjust the settings on the fan limit.

Dec 24, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

Weak flame in intertherm furnace


Ok, so we can rule out the ignitor. (standing pilot systems can develop problems that will cause such symptoms.)

Check the gas pressure, make sure you are getting 11 to 14 PSI.

You need that after the regulator all the way to the manifold.

Also check for cracks in the heat exchanger, causing the wind from the blower to distort the flame pattern enough to cause improper contact with the flame sensor.

Make sure the burners and flame channels are clean of rust, and dibri build up, allowing the flame to properly contact the sensors.

Jan 18, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

Intertherm Furnace Will not stay on


Your furnace is likely getting too hot check your filter. make sure the fan is running. if you have weak air flow you may have a blocked heat transfer coil. you should have your heating and cooling system serviced yearly by a qualified company to inspect and test equipment.

Jan 04, 2009 | Intertherm Air Conditioners

Not finding what you are looking for?
Intertherm P3RA-048K Air Conditioner Logo

341 people viewed this question

Ask a Question

Usually answered in minutes!

Top Intertherm Air Conditioners Experts

gbob59

Level 3 Expert

2963 Answers

MightyMikeJr

Level 3 Expert

347 Answers

Brad Brown

Level 3 Expert

13536 Answers

Are you an Intertherm Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...