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Mains out of limits - Powerware 9120 UPS System

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Limit switch code flashes no inducer motor or ignition starting


usually the main blower runs non stop when limit circuit opens. Shut off the power and check each limit with the wires removed. Use your meter, check the same way as you would check a fuse. Sometimes you can tap on the main limit to reset it. Some secondary limits have a small plastic reset button in between the wires. Check this also.

Nov 27, 2011 | Goodman Heating & Cooling

1 Answer

I have a coleman heater (central heating/A/C) Excel energy had a 2 hour power outage this morning unplanned and now I am trying to reset the thermostat so the heater will come back on) I had to reset the...


Hello, You may have this already solved by now but here goes. If your unit was running at the time of the power outage, you may have a limit switch kicked. This would cause your main blower to run non-stop with no heat. Gas furnaces has a main limit mounted on the wall of the heat chamber. This one should reset automatic when it cools down. Then you have a limit (maniual) reset on the blower casing. This is a small round device with two small wires coming off of it that goes toward the main board. If you can find this limit switch it will have a small button in between the two wires where they attach. Push in this button, if it clicks it should light the flame.There may be another limit on the burner casing. Try pushing this one also. When the power goes out when the flames are on this will build a lot of heat up near the blower causing this limit to kick off. Hope this helps.

Feb 03, 2011 | Coleman Propane Forced Air Heater...

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...

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I have a 40c+ss pitco fryer.the pilot will go out at random times.Could be 1hr or 24 hrs after it is lit. The gas valve has been change, and the thermalpile has been replaced.


Check if your pilot flame sufficiently heats thermopile during operation and make sure also that it is free of soot or any form of dirt, thermopile generates small amount of electricity to energize pilot and main valve of the gas valve for pilot and main burner operation. This electricity passes through hi limit mechanical contacts. Hi limit on fryers act as safety device which will shut down pilot and burner flame when oil temperature reaches 450F.
If your fryer is set at 350F and over shoots up to 450F (which will trip hi limit and shut down pilot and burner flame), the thermostat is not good, but, if hi limit trips on temperature much lower than 450F, hi limit is bad.

Nov 12, 2010 | Pitco Frialator 40CNG Deep Fryer

1 Answer

I have JANITROL GAS FURNACE that the MAIN LIMIT


First, replace the limit. What causes a furnace to cycle frequently would be either a malfunctioning thermostat, a shorted thermostat wire, a bad control or the thermostats heat anticipator is not set right.

Jan 30, 2010 | Heating & Cooling

2 Answers

I have a goodman GMP 125-5 furnace. I have


sounds like the primary limit typically behind the gas valve its larger then the others, rectangle in shape with 2 wires going to it. be careful if your bypassing limit this can create a very hazardous condition

Nov 06, 2009 | Goodman GDS80904BNA Open Flame Heater

2 Answers

Pilot light


Assuming that your make up air and exhaust hood are properly balanced, no negetive pressure conditions exist, your gas manifold pressure is at 4" wc, your air/gas mix on the burner set correctly, the your problem would be the pilot adjustment. If the flame is not intense enough flame to survive the sudden air shock, it will go out.

The pilot height should be about 1 1/2". Your Pilot orfice could also need cleaning. Eliminate excessive draft in your kitchen.

Here is the manual for your unit, it covers these topics.

http://www.frymaster.com/docs/uploaded/fry/products/OperationalManuals/819-5355.pdf

Jan 24, 2009 | Frymaster Dean H17-SC Deep Fryer

1 Answer

Goodman furnace blinks four times


If the main limit switch is bad, the part is cheap and you can replace it. If the main limit switch is not bad and is activating for a reason, you probably need a professional.

Jan 14, 2009 | Goodman GMS90703BXA Heater

1 Answer

SR24


It could be a faulty high limit, you can also check the high limit probe to insure it is mounted securely against the through tube wall in the grease. Also check the burner, there are baffles that run through it and when they get old the flames don't move though the burner correctly and will cause the high limit to trip prematurely

Nov 09, 2008 | Frymaster Dean 2424G Deep Fryer

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