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Heating elements on one side of furnace show 240v when off

My furnace is not warming my house, air is only lukewarm. Replaced sequencing relay on left side just because was cheap, heating elements on that left side still showing 240v when testing each set of black and orange connection points to breaker ground. I have pictures and the wiring scematics Any ideas?

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  • Contributor
  • 15 Answers

What type of furnace make/model

Posted on Jan 17, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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protek480
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SOURCE: whirlpool leb6000pq1 not heating

Thermostat controls heat. There is also a

motor centrifulgal switch, in the element

circuit, that the motor closes to insure

the motor is turning. Try another heat

setting. There is more than one

thermostat. You may have blown the

'thermal fuse' too, which requires

replacement. The elecment has a contact in

the 'timer' circuit too.

It is possible that your element has

failed also.

Tripped high limit. Must clean the lint

filter and the exhaust vent tube and all

the way in to the dryer. Hot air exit is

restricted.

Posted on Jul 12, 2009

  • 45 Answers

SOURCE: My kenmore series 80 electric dryer does not heat.

Yes, hook it up, but before you do that Vacuumn every piece of lint out of the cabinet. Also check TCO and check the thermostats for continuity. They should all read zero ohms.If one of them is open, replace it.

Also use your ohmmeter to check the heating element, It should not show an open condition.

Posted on Jul 29, 2009

jumptrout51
  • 3361 Answers

SOURCE: Whirlpool Dryer not heating

The motor has to be running for voltage to exit the motor going to the heater. With the back off the dryer and the motor running you should read 220 volts at the heater if all safetys and thermostats are good.
There is a thermal cut out relay on the heat canister. It must read continuity also.
Remember you must remove at least one wire from each component being tested to get a true open or closed reading. If a wire is left connected you get a false reading.
The heating element could be broken and part of the heater wire touching the canister. This would cause a continuity reading and still no heat.
Finally, yes,the centrifugal switch in the motor could be bad and not sending power to the heater on the red wire.

Posted on Oct 18, 2009

Testimonial: "I did determine it to be the cetrepetal switch..specifically the slide for the weights was heavily gummed up with dryer belt dust. It works now."

aasc
  • 1606 Answers

SOURCE: MY ROPER DRYER QUIT HEATING STILLS WORKS NO HEAT

The thermal cut-off , which is the small t-stat looking piece located at the top of the element housing ( on vertical mount elements ) or the far front of the element housing ( on horizontal mount elements ) , is usually the cause for no heat .

Posted on Aug 02, 2010

  • 1531 Answers

SOURCE: My Kenmore 400series 6942 electric

This is the most common locations for thermal fuses and heating element on Whirlpool,Kenmore,Estate dryers. seth765.jpg if there is no heat then one of the thermal fuses is bad you will need to check the continuity on them and replace the one that does not have any continuity

Posted on Jan 20, 2011

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2 Answers

I have a colman furnace one element stays on constantly can you tell me why


Furnace is the term we use for a gas system. I'm assuming you have an electric "air handler"(unit), and or has 1 element staying on, glowing red, and cycling on a limit. These elements are controlled by "heat sequencers", heat relays, and some older units used heat contactor's. This "switch" is stuck closed & must be replaced. I've also seen a direct short at the element itself, where the element has come apart, and a part of that element had touched ground. This completed the circuit and allowed the element the energize. Hope this helps! Its probably a stuck (closed), switch that's supposed to open when the tatat is satisfied.

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Most electric furnaces use time delay relays called sequencers to turn the heating elements on and off. If your thermostat is calling for heat, the sequencer coil should get 24 volts and the contacts will close in a pre-determined order bringing on each element individually. If the sequencer coil is getting 24 volts and the elements are not heating, then one of the following issues is going on. 1. The sequencer contacts are not closing because it is defective. Therefore the heating element is never getting proper voltage (usually 208/230V) 2. The heating element may be broken. 3. The high temperature limit switch for the element may be open, not allowing proper voltage to the element, or 4. The element is not getting proper voltage because of a blown fuse, tripped breaker, or broken wire. I hope this helps!!!

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1 Answer

Mi electric furnace works but is not heating up


Ohm out the elements & make sure that the relay or sequencer is switching voltage through to the elements

Dec 09, 2013 | Heating & Cooling

1 Answer

What dose the sequencer do on a home furnace


On a call for heat, a heating element in the sequencer starts warming a small heating element which causes a small piece of bi-metal to warp. As it warps it pushes on relays which first light the burner and a short time later, start the fan.

Nov 21, 2013 | Heating & Cooling

2 Answers

Electric furnace not working


Check for bad contacts between the wires and the heater elements. I've seen that problem on stoves and clothes dryers. If the insulation on the wires looks burned right at the terminals, that's a strong indication that the contacts are severely oxidized. in that case, it is necessary either to polish or replace the terminals. If the insulation on the wire is brittle due to overheating, you'll have to cut off the damaged section of wire and put on a new terminal. If the wire is too short after removing the bad part, it is best to replace the wire with equivalent high-temperature wire of the same size and color.

If you have a multi-meter, turn off the breaker for the furnace in the breaker panel, then measure the resistance of the heater element. If it is a value much larger than that shown on the schematic, start looking for bad terminals, It's possible the problem is where the heater element wire is crimped in its terminal; if so, you may have to replace the heater element.

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Furnace is blowing cold air.


You must have an electric furnace, gas furnaces only come on when the heater is warm. Electric heaters come on with the use of a sequencer. Your sequencer, tstat, and blower is fine, which means you must have broken heating element. I have a nice pictoral of how to restring one HERE

Feb 21, 2011 | Carrier Heating & Cooling

2 Answers

I have a Goodman Electric furnace, Model AR 30-1 that is not putting out enough heat. Could it be that the heating coil is going out? Air from ducts is lukewarm at best.


There are more than one set of electric coils in these units. You can test each one with an amprobe to see which one has no flow. Than it is a matter of finding out why. Sequencers stagger the starting order of coils in electric furnaces, could have one of several other issues!

Feb 02, 2011 | Goodman Heating & Cooling

2 Answers

I have a coleman evcon electric furnace ,it was running and would not cutoff the heat got up to around 90 thhe thermostad said it was running in aux ,so I turn the main breaker off and the in a few minute...


If the thermostat is ok which it probably is then your sequencer is most likely stuck i would say. You could verify that by removing 24 volts to the sequencer to see if it will shut down the heater
themobilian_598.jpg When low voltage from the thermostat is applied at the base of this sequencer it heats a bi-metal and turns on each coil and fan in a sequence that will insure the breaker don't throw from the power surge AND warm air comes out the vents when that fan comes on. I would start there.

Dec 28, 2010 | Coleman Heating & Cooling

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