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York furnace won't ignite

York Diamond 80 Furnace won't ignite. Replaced ignitor, cleaned flame sensor. Bower will come on, no error codes on main board. Board fuses are good. I hear a click when turning heater, but igniter does not glow. Never hear anything else, just one click. No smell of gas. Thanks.

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  • Master
  • 1,033 Answers

Is the igniter receiving 120 volts after the pressure switch closes? If not, either the board is bad or the pressure switch is open

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

Therinnaiguy
  • 1420 Answers

SOURCE: FURNACE COMES ON AND SHUTS DOWN WITHIN 15 SECONDS

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). When all else fails, check the ground connection for corrosion.

Posted on Nov 23, 2009

Accurate Joe
  • 61 Answers

SOURCE: Goodman GMP075-3 ignition problem

Test while the unit is firing with a meter. you should have 24 volts going to gas valve. If you do and no gas is coming out, you have a bad gas valve. You will need a gas pressure test kit to install a new one correctly.

Posted on Dec 01, 2008

  • 1033 Answers

SOURCE: Gas furnace with Honeywell smart valve code error

Hello, it sounds like your Furnace might be shutting off due to your high limit switch.A limit switch will open when the furnace overheats due to low airflow, . check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor. Anything that restricts airflow will cause a limit switch to open.

Posted on Mar 08, 2011

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2 Answers

I have a 11 year-old york diamond 80 furnace. The flame sensor lights up and ignite the flame for about 5-6 seconds. Soon the flame goes out once again. There's this clicking sound that is heard every


You need to clean the sensor with steel wool so its very clean check sensor connections . If it is still not working you could change sensor also check out the pressure switch .

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1 Answer

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OK so you replaced the Thermostat huh? OK well then did you also replace the Thermistor Temperature Sensor? or whatever is used? As often it's BOTH, also check the wiring from the sensor to the host, in any event if it's NOT that then all it can be is the controller board, most likely the Micro? Check any and all sensors first though.. try to get a service manual too, it's hard without one?

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1 Answer

I have a york furnace trhat when it initially ignites the flame comes on for a few seconds then shuts down. I can manually shut it off completely then restart it and most times it will come back on. I cant...


Make sure the flame sensor is clean near the burners, The flame sensor is a metal rod that is on the opposite side of the ignitor. To clean the flame sensor you will need some steel wool, turn off power to the furnace and remove the flame sensor and clean it with the steel wool. I will post a pic of a flame sensor.robhvac47_6.jpg

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Hi check out the pressure switch clean the air filter and check out the fan control see if this is clean

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My york diamond 80 can be fired up, but it is shut off automaticaly after approx. 20sec. This can be repeated 3 times. I beleive the fun and borad panel are working fine.


The flame sensor might have dust build up on it. The flame sensor makes sure that the system has ignited before it starts the main blower. If it ignite and burns for 15-20 seconds then goes out that is most likely your problem. Identify a probe that is in the direct path of the flame(usually in the last burner tube from the gas source), it will have one wire coming off of it and usually has one screw holding it in place. As time goes by the sensor will get a build up on it and stop functioning. Turn the power to your furnace off, then remove the screw and then gently pull the flame sensor out. Using a MILD abrasive like panty hose of paper towel (DO NOT USE sand paper) clean the sensor and then put it back into place. Tighten the screw and then turn your furnace back on. That should fix your problem.

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