Question about Heating & Cooling
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.
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
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
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
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
Tips for a great answer:
Dec 30, 2016 | Heating & Cooling
Jun 20, 2017 | Heating & Cooling
Oct 20, 2011 | York Furnace Draft Inducer Blower Fasco #...
Feb 11, 2011 | York Furnace Draft Inducer Blower Fasco #...
Jan 11, 2011 | York Yankees Bedding MLB Comforter
Jan 07, 2011 | Heating & Cooling
Oct 18, 2009 | York Furnace Draft Inducer Blower Fasco #...
Jun 20, 2009 | York Furnace Draft Inducer Blower Fasco #...
755 people viewed this question
Usually answered in minutes!