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No power at high rpm


I'm guessing but this sounds like air problems. do you have a new air filter? The O2 sensor may be off but not technically bad yet. I'm pretty much stuck on something restricting the air flow.

Jan 17, 2015 | 2000 GMC Jimmy

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Pilot wont stay lit falcon dominator fryer


There are several possible causes of this problem, aside from a loose or damaged wire, which is uncommon. The cause in about 95% of the cases is a thermopile that has gone bad. The thermopile is the small cylinder that is attached to the pilot assembly where part of the pilot flame can contact it. It has a cable or wire going to the gas valve, high limit switch, or both. When hot enough, it produces and electrical current that keep the pilot on and allows the main gas valve to open. This is not hard to replace in most gas fryers and not too expensive. This often starts as an intermittent problem. The second possible cause is a defective high limit. The high limit is a small rectangular device with wires going to the gas valve and a tiny stainless tube that goes through the bottom of the kettle to a sensor bulb, like the thermostat has. These are usually self resetting, but may have a small red reset button. If present check the reset. If no reset, jump the two wires and see if the fryer will now light. If so, the high limit is defective, assuming the fryer is not over temperature. If defective, replace. Do not operate the fryer in this condition as there is no over temperature protection. The next cause is if the oil is too hot, in which case the high limit will shut off both the main burner and the pilot. The pilot cannot be relit until the fryer cools down and the high limit resets. If the oil is too hot, usually over 425F, replace the thermostat. If the high limit trips when the oil is in the normal operating range, replace the high limit. The final cause is a bad gas valve. This is not too common, but the gas valve is expensive and a bit difficult to replace. Check all of the other causes first.

Sep 19, 2014 | Kitchen Appliances - Others

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Nearest engineer to Stamford


There are several possible causes of this problem, aside from a loose or damaged wire, which is uncommon. The cause in about 95% of the cases is a thermopile that has gone bad. The thermopile is the small cylinder that is attached to the pilot assembly where part of the pilot flame can contact it. It has a cable or wire going to the gas valve, high limit switch, or both. When hot enough, it produces and electrical current that keep the pilot on and allows the main gas valve to open. This is not hard to replace in most gas fryers and not too expensive. This often starts as an intermittent problem. The second possible cause is a defective high limit. The high limit is a small rectangular device with wires going to the gas valve and a tiny stainless tube that goes through the bottom of the kettle to a sensor bulb, like the thermostat has. These are usually self resetting, but may have a small red reset button. If present check the reset. If no reset, jump the two wires and see if the fryer will now light. If so, the high limit is defective, assuming the fryer is not over temperature. If defective, replace. Do not operate the fryer in this condition as there is no over temperature protection. The next cause is if the oil is too hot, in which case the high limit will shut off both the main burner and the pilot. The pilot cannot be relit until the fryer cools down and the high limit resets. If the oil is too hot, usually over 425F, replace the thermostat. If the high limit trips when the oil is in the normal operating range, replace the high limit. The final cause is a bad gas valve. This is not too common, but the gas valve is expensive and a bit difficult to replace. Check all of the other causes first.

Sep 16, 2014 | Pitco Frialator Kitchen Appliances -...

1 Answer

Frymaster troubleshooting


There are several possible causes of this problem, aside from a loose or damaged wire, which is uncommon. The cause in about 95% of the cases is a thermopile that has gone bad. The thermopile is the small cylinder that is attached to the pilot assembly where part of the pilot flame can contact it. It has a cable or wire going to the gas valve, high limit switch, or both. When hot enough, it produces and electrical current that keep the pilot on and allows the main gas valve to open. This is not hard to replace in most gas fryers and not too expensive. This often starts as an intermittent problem. The second possible cause is a defective high limit. The high limit is a small rectangular device with wires going to the gas valve and a tiny stainless tube that goes through the bottom of the kettle to a sensor bulb, like the thermostat has. These are usually self resetting, but may have a small red reset button. If present check the reset. If no reset, jump the two wires and see if the fryer will now light. If so, the high limit is defective, assuming the fryer is not over temperature. If defective, replace. Do not operate the fryer in this condition as there is no over temperature protection. The next cause is if the oil is too hot, in which case the high limit will shut off both the main burner and the pilot. The pilot cannot be relit until the fryer cools down and the high limit resets. If the oil is too hot, usually over 425F, replace the thermostat. If the high limit trips when the oil is in the normal operating range, replace the high limit. The final cause is a bad gas valve. This is not too common, but the gas valve is expensive and a bit difficult to replace. Check all of the other causes first.

Aug 24, 2014 | Kitchen Appliances - Others

1 Answer

Have Goodman GDS81155CNA, throwing open high limit relay. Have to pull main breaker to get to reset. I have already taken the entire furnace apart and cleaned it (completely, motort, evap coil cleaned,...


What about the safety limits for over heating? You have tackled all obvious problems, I am only throwing this out there because while the high limit is jumped out, to get the open high limit is definitely strange. So i would be tracing my wiring backwards from the relay to see what else is in line with it. This is not a solution but only a suggestion before running out to purchase the main control board, as most places will not accept a board back if that is not the culprit. Good luck with this one it leaves me slightly puzzled??

Jan 07, 2011 | Goodman GDS81155CNA Open Flame Mid-Size...

1 Answer

Furnace quit working after power outage


Hi,
Check the high limit switch and reset it... the latent heat in there trips the high limit...

The high limit is usually near the blower compartment and has a little red button in the center that you need to push back in to reset it...

heatman101

Dec 14, 2010 | Heating & Cooling

1 Answer

Fryer was working before being cleaned but a cook started it up without the oil now nothing will work?


Hopefully it has kicked out on high limit thermostat. It depends a lot ofn what type of control you have on your fryer. If they are all mechanical controls, the high limit may need to be reset. Open the front door of the fryer. There are two thermostat bulbs in the fryer. One goes to the thermostat with the temperature dial, the other to the high limit thermostat. Hopefully the high limit thermostat that you have will have a small red button sticking out. Push that button in and then relight the pilot as you would normally do. If your high limit thermostat does not have a red button it is an automatic reset high limit. When the fryer pot cools below 300 degrees it should reset itself. If you have electronic computer controls on your fryer you will have to reprogram your thermostat settings.

Sep 08, 2010 | Pitco Frialator 35CD Deep Fryer

1 Answer

I have a dyno glo rmc-fa100dlx forced air heater. It will light and work for a few minutes, up to about 5, then it will stop heating and the fan will keep blowing. any ideas? thanks!


If the unit comes on and runs but then shuts down, that sounds like an indication of a high limit trip.

Most, if not all, furnaces have high limit switches that keep a constant check on the temp inside the furnace or air handler. On most systems, once this high limit switch has been made (got to hot), the limit switch breaks control voltage to the heating device (strips, gas, fuel, etc.etc..). The blower motor continues to run until the high limit has dropped in temp and reset itself.

On some models, the high limit is a manual reset, meaning you need to reset the switch yourself or shut the unit off and then back on to reset it.


Check all filters and replace as necessary. Check the coils and fan blades for dirt build-up and cleanliness. Check motor belt (if applicable). If all these fail to solve the problem, then your issue either lies within the blower motor itself not moving enough air for proper heat transfer. Or the high limit switch itself is failing.

Jan 09, 2010 | Heating & Cooling

1 Answer

MH 18 B wont stay lit


sounds like you have a limit safety issue, the unit is over heating and kicking out on high limit, or the limit is weak, either way you should look into replacing the limit, hope that helps

Jan 19, 2009 | Mr. Heater (F274825)

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