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My monitor 422 ignites, warms up, but circulation fan never starts, and ultimately the burner shuts down, burner status lights flash. Suggestions?

Combustion chamber gets nice and hot, but it's shutting down without circulation fan ever coming on.

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  • 148 Answers

Blower fan relay for older unit or board for newer unit

Posted on Nov 23, 2014

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6ya6ya
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Posted on Jan 02, 2017

heatman101
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SOURCE: Main blower fan is not starting on my York Diamond

Hi,
Check to see if the blower motor is actually getting power to it...You will have to check for power on the heating speed terminal... and the neutral wires....you should have 120v across those two wires....
If you have power then the motor is bad...if no power then the heating relay went bad on the circuit board and you will have to replace the circuit board...

That is a common problem as those relays are often to light and wear out...

Just realize that without an electrical meter to trace things through you are really just grabbing at possibilities and not really able to correctly diagnose your problem...

heatman101

Posted on Dec 08, 2010

  • 1 Answer

SOURCE: BURNER STATUS LIGHTS START FLASHING, SHUTS DOWN!

Not sure exactly what is meant by half way it shuts off. My furnance wouldn't heat to 68 degrees from a setting of 63 degrees on the setback thermostat without shutting down several times with a single flashing led. It would reset after an hour or so until it finally reached the 68 degrees. The problem turned out to be the tube that drains the water from the blower assembly. It had a belly in the middle which would cause the water to sit and block the airflow sensor for the gas value. Lifted tube to allow proper drainage to correct.

Posted on Dec 24, 2008

  • 1 Answer

SOURCE: mpi monitor 422 heat problem

I had the same problem last night and this morning. Its in the manual. I had to take the fan off of the back and vaccuum out all of the dust/lint that built up and it was a lot. It is a safety feature. It's a overheating protection feature that usually triggers if there is build up in the fan, front vent or vent pipe to the outside. I hope this helps.

Posted on Jan 06, 2009

tborn6
  • 700 Answers

SOURCE: Goodman pgb 0300751 gas package

then you need toi have them check the fan high limit that is mounted in the blower compartment. if it's closed then the blower fan and the conmbustion air fan will run together.

Posted on Feb 04, 2009

shastalaker7
  • 1515 Answers

SOURCE: Monitor 41 heater not getting fuel

The problem would be in the inducer or combustion motor not starting up and running. This is a safety or one of several in you're system. When the fan comes on, the draft sends air to a switch telling you're unit that fan is on and ready to fire up.If the fan fails, no heat.Check for voltage to the fan motor. Even though it is free doesn't mean that it will work anymore.If there is no power to the motor, on a call for heat, you need to look at the schematic and find out where this motor gets its power. If there is power, remove it and try and find a dealer online or near by to where you can get one.It has to be working. I am surprised the burners come on at all.
Good Luck Wayne, and please let me know what you find out. Sincerely, Shastalaker7

Posted on Nov 05, 2009

Testimonial: "Thanks a bunch. I'm trying to find a schematic!"

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Mpi monitor 422 heat problem


I had the same problem last night and this morning. Its in the manual. I had to take the fan off of the back and vaccuum out all of the dust/lint that built up and it was a lot. It is a safety feature. It's a overheating protection feature that usually triggers if there is build up in the fan, front vent or vent pipe to the outside. I hope this helps.

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BURNER STATUS LIGHTS START FLASHING, SHUTS DOWN!


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