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High aux or spill limit switch diamond 80 - Heating & Cooling

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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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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SOURCE: 4 blinks, main limit switch open or aux limit

There is a limit switch above the burner with 2 wires going to it. Take a jump wire and jump out the switch to test it, It is 110 volts so be careful. If it fires, that switch is bad and will need to be replaced. There may be up to two more switches on the same circuit. These switches may be reset-able if there is a small dark red button between the two terminals. Why did the unit overheat in the first place. Is your air filter clean? Is the room air blower working? Are all return air grills free of obstructions?

Posted on Jan 25, 2010

  • 43501 Answers

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

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 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...


Posted on Dec 08, 2010

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30000BTU wall heater keeps shutting off LP gas supply.Pilot stays on,when I turn up the thermostat gas comes on, after a short time, gas supply & pilot shut off with a sharp loud noise

It sounds like either the high limit or the spill switch is bad. These are snap disc thermo safety devices. Locate and jump out, one at a time. If unit works when you jump out the limit, replace it. The same goes for the spill switch.

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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.

Apr 01, 2017 | Heating & Cooling

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Where is the high limit switch on a york diamond 80? red light blinks 4x

The limit switch will typically be the size of a credit card and flat looking swiych between the burners and inducer motor, there will be 2 wires attaxhed to it.

Jan 09, 2013 | Heating & Cooling

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My light on circuit board flashes four times

Jump out limit switch and see if it works and stops flashing .

Jan 01, 2013 | Dayton Gas Furnace Heater

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Our furnace blows only cold air, after power outage during ice storm. The diagnostic LED light blinks 4 times. This means "High auxilary or Spill Limit Switch Open." How do I correct this...

Spill limit switch indicates that exhaust from the unit was prevented from going into the chimney. This can be a serious problem best left to a Pro.

Feb 02, 2011 | Heating & Cooling

1 Answer

My central AC is a York Diamond 80 (also my furnace). Thermostat set on Cool, isn't cooling. and when i shut thermostat off, it continues to blow air. red light flashing inside unit code = Limit switch...

One of the limit switch in the furnace is tripped or went bad....
Try to find all of the reset switches and push the little red button on the top to reset them...
If that don't work you will need to take an electric meter and test each switch to see which one is bad...


Aug 23, 2010 | Heating & Cooling

1 Answer

York "high Aux or spill limit switch open"

how can I fix the spill limit switch, also how do I found it

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