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Intertherm furnace loses flame in mid cycle. where can I get a chart for diagnostic codes? thanks

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Intertherm is a Miller furnace. Google your model number or Miller Gas Furnace.

Posted on Dec 05, 2008

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Furnace won't stay lit. Intertherm Model M2RC-080A-16BN. Ignightor glows, flame starts and after a few seconds the flame shuts off. Then it starts the cycle again. It goes thru this cycle a fe


It sounds like the flame sensor is bad. If thats not the case you may need to replace the control board. You should make sure the flame sensor is directly into the flame.

Nov 20, 2014 | Intertherm Heating & Cooling

1 Answer

Indicator blicks 3 times replaced combustion air switch but did not resolve problem. what do i do now?


There should be a diagnostic chart on the furnace door by the wiring schematic. If so see what the code reads for three blinks.
By the term "air combustion switch" I guess you are referring to the pressure switch. Most diagnostics blinking three times is just a dirty flame sensor. If this is the case the burners will light and go out within 4 seconds. If this is the problem carefully remove the flame sensor and clean gently with emery cloth, fine sandpaper or fine steel wool. Reinsert the sensor and enjoy your heat.

Feb 14, 2014 | Coleman 7990-319p Evcon Gas Furnace...

1 Answer

Intertherm M3rl080A BW furnace that shuts down will no indication of fault


If your diagnostic indicator is not picking showing a fault code than it thinks everything is ok with the furnace. It could be a bad thermostat. (or the heat anticipator in the thermostat).

Jan 30, 2014 | Intertherm 56000 Btu Gas Furnace

1 Answer

Furnace will not run complete cycle ,several clicks and the and the furnace shutdown and restarts, will not bring the house to temperature


If it's a 90%+ gas furnace, check the combustion air pvc pipe for blockage, if not enough air for proper combustion, control board will shut down the flame to keep from burning poorly! Check your air filter, there's an overtemperature safety switch in the heat exchanger to protect the furnace/ your house, and low airflow will cause the heat exchanger to overheat. Finally, check to see if the flames actually ignite, if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again.... get the idea? :) If this is the case, check my other solutions, I just answered someone elses question about non ignition. Hope this helps.

Mar 23, 2013 | Intertherm P3RA-048K Air Conditioner

1 Answer

Intertherm furnace has no flame


It has an ignition control problem. Check the ignition transformer, relay, and the fuse.

Oct 28, 2012 | AO Smith Intertherm Furnace Motor 1/8hp...

1 Answer

I have a furnace that flashes the code 3 it is a Intertherm Furnace


The flame sensor ( a rod in the flame usually right at the burner) is not telling the control board a flame is present. Take it off, and clean it with steel wool. If that doesn't help, you'll need to replace it.

Nov 01, 2009 | Heating & Cooling

1 Answer

My burner goes on but shuts off early and blows cold air. it is a goodman furnace. where should i start to solve this problem. i just had furnace cleaned and flame sensor cleaned. should i buy a new flame...


First when it goes out again, locate the furnace and look thru a small viewing port to see if there is a light blinking, count the number of blinks. Then look at the wiring diagram for a diagnostic code chart. This will give you a strart of where to look.

Oct 17, 2009 | Goodman Heating & Cooling

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

2 Answers

My Amana Gas Fired Air Furnace (80) failed to come on with warm air. Blower works but cold air only? Is there an obvious problem here?


first, clean the flame sensor, does the draft motor come on?  could be ignition control board failure

Nov 15, 2008 | Amana Heating & Cooling

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