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Furnace keeps tripping breaker nothing happened to furnace and no bear wires wire cheked up to the furnace all good and changed the breaker still tripping

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  • garymjr Mar 31, 2011

    i cant get a pic it is at my grandparents house not mine and i am home but i can say that i just replaced the breaker today and it didnt help from the box it goes to the inline 30 amp screw in fuse and then to a light on off switch approx three feet of wire from there to the furnace with no frays but if i turn the switch off the breaker will reset and stay on but if i turn it on the breaker immediatly trips and the motor got some water on it about a mounth ago dried it for two days with a fan and reinstalled and worked until yesterday now this problem could they be related and would a bad blower motor cause this problem and thanks for your response and help

  • garymjr Mar 31, 2011

    there is a new breaker then a fuse and then a switch if i turn the switch off the breaker will reset and hold but if i turn it on it willl trip the blower motor got wet from flooding a mounth ago but i dried it and blower with a fan for two days and reassembled and it was fin until this could this be related blower was under water but not the motor and there are no frayed wires

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When does it trip? Do the burners light first? How many minutes from "ON" to trip?

Posted on Mar 31, 2011

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  • garymjr Mar 31, 2011

    as soon as i try to reset the breaker it trips burners do not light and the piolt is lit

  • Roger Jelinek Mar 31, 2011

    I wish there was a sure fix , but it is a dead short that could be anywhere from the panel itself to the control panel in the furnace. The pilostat that holds the pilot on is completely self generating and not at all linked to a line voltage problem. Can you send a picture of the burner and blower compartments? Dead shorts are VERY unusual.

  • Roger Jelinek Mar 31, 2011

    Sorry this is so late. Its 8 AM here. It could be the motor but that only starts immediately when in the AC mode. If you are trying to cool, try it with the thermostat in the heating mode. In heating there is a delay on the fan to allow the plenum time to heat up so you don't get cold air on start up. If your thermostat is in the heating mode and the breaker still trips immediately and you are fairly sure its the motor doing it, you may have more than 1 problem. Give me all the info. you can. A picture of the burner compartment and of the terminal strip where the thermostat wires tie in will help me a lot. Be careful from here on. Shock Hazard!

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None it just hurts right away doesnt even turn on

Posted on Jan 10, 2016

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I have a new furnace and the breaker keeps tripping (20/30). It is a bryant westinghouse box. I think 200 amphes


1) You got a FIRE truck coming.

2) Wire is too small.
Problem is NOT circuit breaker.

3) Both 240Volt appliances on same breaker is a hazard, especially if space available in 200 amp service panel for more breakers.

4) Usually each 240V appliance has separate breaker.

5) Circuit breaker trips because of High heat on the wire.
If wire gets hot, it will start a fire inside the wall.

Electric code requires wire-size match breaker-size.

6) If you put larger amp breaker on same wire that is getting hot, then wire will get hotter.
Result: FIRE truck middle of night with folks jumping out window in glass-cut bare run across yard.

7) Each appliance has volts and watt rating on label.
EVERY appliance has label.

8) For example stove might be rated 8000 watts and 240Volt.
8000 watts divided by 240 volts = 33.3 amps
Stove would require 40 amp breaker and 8 gauge wire.

9) How to figure it out:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/How-to-install-a-subpanel.html

10) Do same calculation for new furnace.
12000 watt furnace divided by 240 volts = 50 amps.
Use 60 amp breaker and 6 gauge wire.

11) Summary: fixya wants you to be safe, and buy stuff showing in the ads.
Use a bigger breaker ONLY when bigger wire is also installed.
Call furnace installer, the installer should know to check safe wiring before installing.

Nov 04, 2012 | Bryant Westinghouse Bqc Quad Circuit...

1 Answer

We have a 1999 "Thermal


DO NOT install a 20 amp breaker, you can cause a fire. The breaker is rated for the WIRES, and unless you change out the wires, the 15 amp wires will overheat and can cause a fire.
Typically, A/C units need dedicated power, with nothing else on that circuit.
One step that you may try is a new 15 amp breaker. Once a breaker starts tripping, is starts tripping earlier....
You may wind up running a new circuit for the A/C, if you do, size it for the A/C.

Jul 18, 2011 | Heating & Cooling

1 Answer

Furnace keeps tripping the breaker changed breaker and wires all good up to the furnace still keeps tripping when i try to turn power on. nothing happened to the furnace and the wires were tested up to the...


Disconnect the black power wire where it is connected to the furnace with breaker off. Put a wire nut on it and then turn the breaker on. If it continues to trip, the problem is not the furnace and you will have to trace the power wire back to the breaker box to find problem. Next, disconnect the black wire from the breaker (with breaker off) and then snap breaker on. If it trips, bad breaker. If the furnace was disconnected and breaker did not trip, you have a short either on the P C Board or the transformer.

Mar 31, 2011 | Heating & Cooling

1 Answer

When I plug oven into outlet the breaker trips.


there is a short somewhere there, you will have to ohm's check it

Jun 21, 2010 | Kenmore 33464 / 33465 / 33469 Gas Single...

1 Answer

THERMOSTAT HAS NO POWER


Hi, yes the thermostat feed does come off the furnace from the transformer. That's where it gets it 24 volt supply, 120 volts is stepped down to 24 volts for the controls. If it trips the main breaker, it may be a matter of the wires that feed the breaker are loose and this will cause the breaker to over heat and trip. Shut it off and tighten the wires.The breaker may also be weak. This is a high voltage problem. So, anything that runs off of this breaker can cause it to trip, like the blower motor may be drawing to much amperage. Make sure there is no lint build up on the motor or in the windings or on the blower wheel also. My guess would be the breaker is burned or wires are loose creating enough heat to trip it at times. This is where you will need to start. Keep me posted. If you have a amprobe you can check the rated amps on the data plate of all motors and see what they are drawing under a load. If not, you will have to see whats getting hot, breaker, motors ect. Keep me updated as you will be able to find the problem. Like I said, my bet would be the breaker is going. You can also kill power and pull the breaker to look for any hot or burned spots on it. Concentrate there first.
Best of luck, you should find it quickly.
Shastalaker7

May 24, 2010 | Heating & Cooling

1 Answer

Pushmatic breaker keeps tripping everytime I hit


You have it shorted out somewhere along the line. If it is a light switch you are switching, what have you done lately to make this trip? Anything? You might have a bad breaker. You can check it by shutting off the power, pull the wire out of the tripping breaker, put it in another breaker, turn the power back on, switch the breaker on, then hit the switch and see what happens. If it snaps off, it is not the breaker, but the switch, the wires in the box, or the lights, or something along the line, you will have to check each one. New construction has made all lights and all receptacles separate, so if your house is old, you might be looking at receptacles too. Check anything plugged in to an outlet, make sure there is nothing shorting. Hope this helps.

Apr 03, 2010 | RTO Pushmatic 100Amp 2-pole circuit...

1 Answer

The furnace part of my central air is wired to a seperate breaker but keeps tripping the breaker and making a spark in the breaker box.


Usually a Central Unit is wired seperate, the Air handler inside and the
Cooling unit outside. It appears that the breaker is bad, is it a Single Pole Breaker?

Another possibility is that the indoor blower motor might be bad.

Jan 10, 2010 | Heating & Cooling

2 Answers

Circuit keeps tripping everytime the heat (electric) goes on. Do we need a bigger fuse?


changing the fuse is not a good idea. The fuse is there to protect the wiring going to the furnace. You may want to consult an electrician to make sure the fuse, wire, and loads are compatible. The furnace should be on a circuit by itself

Jan 07, 2010 | Heating & Cooling

1 Answer

30 amp breaker trips intermittently


It sounds like this circuit breaker is worn out and needs to be replaced. good luck

Jan 19, 2009 | Siemens 2 pole 30 amp breaker

1 Answer

Electric furnace wire heating up


you should have a 3- conductor # 6-3 copper wire running to this 60 amp breaker @ the furnace to the panel if this is not the case you should replace this with a # 6 as of now as it is a fire hazard as it is and needs to be fixed at once , # 10 -2 wire is only good for 30 amps and a 60 amp breaker will not trip under fault condition and you could have a fire , if you need further assistance on this let me know and i will try to help

Jan 09, 2009 | Electric Circuit Breaker Kit for Furnace

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