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Furnace door switch shuts off then takes several tries to come back on then shuts down again


If your furnace lights, but then goes off after a few minutes of operation, it sounds like your spill (rollout) switch, sail(air flow) switch, or high limit switch may be bad. These are thermal bimetal snap discs that look like this. This is not the switch for your furnace, it is just an example of what they look like.https://www.zoro.com/value-brand-set-limit-auto-reset-opens-200-468692/i/G4108027/?gclid=CjwKEAjwkq7GBRDun9iu2JjyhmsSJADHCD_HbMFQlYsmob8Xa_l4ZtxZ8hbCir6IxE4dQUJfzvqF2RoCs5zw_wcB
Each disc haS two spade terminals with slip on connectors. One at a time, remove the low voltage control wire from each side of the disc's spades and use a piece if wire to jump the two wires out. If the furnace fires and stays lit, then it was the disc you removed. If it still goes out, move on to the next disc, and repeat the steps until you find the faulty disc. After the furnace has tried to relight three times, it will lock out. To rest, just turn off the red emergency shutoff switch, and turn it back on. This will unlock the control circuit. I can not stress this enough. DO NOT OPERATE THE FURNACE WITH THE SAFETY DEVICE JUMPED OUT. REPLACE IT IMMEDIATELY.

If your furnace has an induced draft, there is also a chance that you either have a weak pressure switch or there is an obstruction in your flue pipe. Both of these conditions would allow for an initial firing of the furnace, but could eventually cause one of the safety switches to overheat and cut off.
The pressure switch looks like a 2 to 2.5 inch flying saucer with hoses and wires going to it. If it has only two wires going to it, you can jump it out the same way you did the discs. If it has more than two wires or if you have to check the flue for obstructions, I suggest hiring a professional.

Mar 17, 2017 | Heating & Cooling

1 Answer

Hi, I have a P36D-1 Regency. After it's on for a while, it shuts down on its own. We relight the pilot, wait a bit and turn the switch back on. Works for a bit and shuts off again. Repeats. Why?


It sounds like one of the safety switches is bad.

If your furnace lights, but then goes off after a few minutes of operation, it sounds like your spill (rollout) switch, sail(air flow) switch, or high limit switch may be bad. These are thermal bimetal snap discs that look like this. This is not the switch for your furnace, it is just an example of what they look like.https://www.zoro.com/value-brand-set-limit-auto-reset-opens-200-468692/i/G4108027/?gclid=CjwKEAjwkq7GBRDun9iu2JjyhmsSJADHCD_HbMFQlYsmob8Xa_l4ZtxZ8hbCir6IxE4dQUJfzvqF2RoCs5zw_wcB
Each disc haS two spade terminals with slip on connectors. One at a time, remove the low voltage control wire from each side of the disc's spades and use a piece if wire to jump the two wires out. If the furnace fires and stays lit, then the problem was in the disc you removed. If it still goes out, move on to the next disc, and repeat the steps until you find the faulty disc. After the furnace has tried to relight three times, it will lock out. To rest, just turn off the red emergency shutoff switch, and turn it back on. This will unlock the control circuit. I can not stress this enough. DO NOT OPERATE THE FURNACE WITH THE SAFETY DEVICE JUMPED OUT. REPLACE IT IMMEDIATELY.

If your furnace has an induced draft, there is also a chance that you either have a weak pressure switch or there is an obstruction in your flue pipe. Both of these conditions would allow for an initial firing of the furnace, but could eventually cause one of the safety switches to overheat and cut off.
The pressure switch looks like a 2 to 2.5 inch flying saucer with hoses and wires going to it. If it has only two wires going to it, you can jump it out the same way you did the discs. If it has more than two wires or if you have to check the flue for obstructions, I suggest hiring a professional.

Mar 16, 2017 | Heating & Cooling

1 Answer

No fault codes appear heater will heat and shut off after 7-10 minutes will restart and do it all over again


If your furnace lights, but then goes off after a few minutes of operation, it sounds like your spill (rollout) switch, sail(air flow) switch, or high limit switch may be bad. These are thermal bimetal snap discs that look like this. This is not the switch for your furnace, it is just an example of what they look like.https://www.zoro.com/value-brand-set-limit-auto-reset-opens-200-468692/i/G4108027/?gclid=CjwKEAjwkq7GBRDun9iu2JjyhmsSJADHCD_HbMFQlYsmob8Xa_l4ZtxZ8hbCir6IxE4dQUJfzvqF2RoCs5zw_wcB
Each disc haS two spade terminals with slip on connectors. One at a time, remove the low voltage control wire from each side of the disc's spades and use a piece if wire to jump the two wires out. If the furnace fires and stays lit, then the problem was in the disc you removed. If it still goes out, move on to the next disc, and repeat the steps until you find the faulty disc. After the furnace has tried to relight three times, it will lock out. To rest, just turn off the red emergency shutoff switch, and turn it back on. This will unlock the control circuit. I cannot stress this enough. DO NOT OPERATE THE FURNACE WITH THE SAFETY DEVICE JUMPED OUT. REPLACE IT IMMEDIATELY.

If your furnace has an induced draft, there is also a chance that you either have a weak pressure switch or there is an obstruction in your flue pipe. Both of these conditions would allow for an initial firing of the furnace, but could eventually cause one of the safety switches to overheat and cut off.
The pressure switch looks like a 2 to 2.5 inch flying saucer with hoses and wires going to it. If it has only two wires going to it, you can jump it out the same way you did the discs. If it has more than two wires or if you have to check the flue for obstructions, I suggest hiring a professional.

Mar 14, 2017 | Heating & Cooling

1 Answer

80,000 btu goodman 80%starts to blow warm air then blows cold air until reset


If your furnace lights, but then goes off after a few minutes of operation, it sounds like your spill (rollout) switch, sail(air flow) switch, or high limit switch may be bad. These are thermal bimetal snap discs that look like this. This is not the switch for your furnace, it is just an example of what they look like.https://www.zoro.com/value-brand-set-limit-auto-reset-opens-200-468692/i/G4108027/?gclid=CjwKEAjwkq7GBRDun9iu2JjyhmsSJADHCD_HbMFQlYsmob8Xa_l4ZtxZ8hbCir6IxE4dQUJfzvqF2RoCs5zw_wcB
Each disc haS two spade terminals with slip on connectors. One at a time, remove the low voltage control wire from each side of the disc's spades and use a piece if wire to jump the two wires out. If the furnace fires and stays lit, then the problem was in the disc you removed. If it still goes out, move on to the next disc, and repeat the steps until you find the faulty disc. After the furnace has tried to relight three times, it will lock out. To rest, just turn off the red emergency shutoff switch, and turn it back on. This will unlock the control circuit. I cannot stress this enough. DO NOT OPERATE THE FURNACE WITH THE SAFETY DEVICE JUMPED OUT. REPLACE IT IMMEDIATELY.

If your furnace has an induced draft, there is also a chance that you either have a weak pressure switch or there is an obstruction in your flue pipe. Both of these conditions would allow for an initial firing of the furnace, but could eventually cause one of the safety switches to overheat and cut off.
The pressure switch looks like a 2 to 2.5 inch flying saucer with hoses and wires going to it. If it has only two wires going to it, you can jump it out the same way you did the discs. If it has more than two wires or if you have to check the flue for obstructions, I suggest hiring a professional.

Mar 11, 2017 | Goodman Heating & Cooling

1 Answer

I need to know where the high and low limit switches are located on a Winrich Dynasty pellet stove


The Low Limit Switch, goes in the combustion fan housing. The High Limit Switch, goes in behind the Room Blower.
Here's a repair site for you to check out, in more depth. Hope this helps! http://www.butkus.org/whitfield_operate/whitfield-pellet-stove-low-limit.htm

Nov 21, 2014 | Pool & Spa

1 Answer

Dryer not heating model #LEA30A amana commercial quality


You need to unplug it and locate the high and low limit switches. These sense the heated airflow temperature. If it gets too hot, the high limit switch kicks off until it cools back down. The low limit switch is used most if the time to cycle the heating element on and off during a normal cycle. I suspect the low limit sensor switch is "open" (has gone bad) and needs replacing. When completely cool, both switches are supposed to be in the On or closed circuit position. You can test them with a ohm meter, looking for low resistance similar to when the two ohm meter test leads are touched together. Again, make SURE the power is off at the breaker or the dryer is unplugged.

Feb 27, 2014 | Amana Dryers

1 Answer

Compressor cut out after 5 minute aircond working


Sound like the unit is going off on the high limit switch or low limit switch. If its going off on high limit your condenser coil is probably very dirty and needs to be cleaned. If it is going out on low limit its most likely low on freon and has major issues.

May 17, 2011 | Heating & Cooling

1 Answer

What do they call the plastic disc by the gear cogs on my mountain bikes back wheel and where can i get one


It's a geek disc (kidding). If you lost it, leave it. It's just there for those who have maladjusted rear derailleur Low Limit adjustments, which limit the distance the derailleur can approach the spokes on the lowest gear.

http://www.parktool.com/blog/repair-help/categories/derailleur-systems

Mar 28, 2011 | Cycling

1 Answer

How to properly install plenum limit switch


If this is the old style limit/fan switch. Turn power off
remove the wires and label where they got disconnected from and wire the new one in. Make note of the settings on the old limit switch so you can
adjust the new one. The limit switches come in
different lengths so get the right one.

If it is a flat bimetal disc, then I think you have only to
wires that have to be connected so hook up same
to wires from the old one. With Bimetal disc fan
limits you need to make sure you get the same
temperature reading as the old one

Jan 16, 2010 | Cozy Enclosed Front Console Heater 70,000...

1 Answer

Jandy LX250 LT Pool Heater High Limit Switch


Jump the High limit switch. If it fires the switch is bad

Jul 16, 2009 | Jandy LAARS LX250 - NATURAL GAS, DIGITAL...

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