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My York Diamond 80 furnace will not ignite? The thermostat does send a signal to the furnace beginning the cycle with inducer starting and contiuing to run. The igniter will not heat up. I have tested the air pressure switch and ignitor swapping on a second unit is the house. All are good. The unit solution light is blinking 3 time indicating open pressure switch did not close. Is there a way to test the inducer to determine if creating necessary pressure?

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5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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  • 92 Answers

SOURCE: Furnace keeps shutting down after lights

time to call service guy you are cycling on a saftey which means somethings not right in ignition circuit the only thing i would tell a untrained person to try is cleaning the flame rod which is part of the pilot assembly it is a metal rod that gives small electric current to ignition device confirming that you have a pilot lite you can lightly sand with sand cloth

Posted on Apr 15, 2009

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  • 116 Answers

SOURCE: Furnace Filter recommendation

measure the out side to outside most likley 20x20x1 or 20x25x1 depends on the size of unit

Posted on May 16, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: HEIL 80% furnace T-STAT calls for heat, Inducer

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Posted on Nov 03, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: York Diamond 80 Furnace: blows cold air after

There may be more than 1 limit switch. Look at the wiring diagram and follow it to all switches. Or jump out the complete circuit.

Posted on Jan 21, 2010

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Each step in the process must be satisfied in order to go to the next one. Yes, make sure the "Hot Surface Igniter" is good. Is the venter motor reaching full speed to close the air switch? Did you check the end of the vent pipe that nothing is obstructing it - like a bird.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/dan_77d17b8918f54455

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There is a diagnostic code flashed from a window in front panel of the furnace. What is it? From your description, I would bet on the ignitor as faulty. The vidoe shows this repair. Don't remove elements and sand them as this fixer did. it is destructive in many cases. York Diamond 80 furnace troubleshooting won start won light flame sensor...

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On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

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