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Changed the sequencers and the blower pauses on startup and also the blower shuts off before the last 2 elements cut off.Blower kicks back on for a few seconds then shuts off after power to elements shuts
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IT SOUNDS LIKE THE FAN CYCLE RELAY OR BOARD IS NOT MAKING THE FAN COME ON WHEN IT SHOULD THE BURNER SHUTS OFF PROBABLY BECAUSE IT REACHES THE HIGH LIMIT.
Yes your sequencer is the switch to energize the elements & sometime the low speed on the blower motor. It completes the 240 volts going to the elements. The sequencer turns the elements on in stages as well as the blower, & most sequencers have numbers on the side to tell what thermal disk turns on first. The blower, & one element should be wired on the 1 & 2 terminals (this turns on first when the sequencer coil is energized & shuts off last when the coil is de-energized). If any of the thermal discs are stuck closed, this will constantly energize the element on that switch.
Replace the sequencer...which is just a series of snap disc relays that are staged. The first snap disc should kick on the first element & low speed of blower. Depending on how many elements you have, determines how many snap discs are on the sequencer. It could be a 2,3,4, or 5 stack. Generally the coil is 24 volts.
ya its probly the blower motor.but can be the switch. you can check if ther is power at the motor with wire tester. test at the blower motor with switch in diff positions 2 see if it gets brighter as you turn the fan up.and if the lighter doesnt work its probly the liter. or maybe the wire came off the back of the element,
I had the identical problem with my York. Problem was the burners. The heating element would light the first burner but the flame wouldn't move to the other burners. The flame sensor didn't detect a flame on the last burner so the gas valve would shut off. I removed and cleaned the burners then reversed the first and last.
no the older rheems had a sequencer for the heat that turned on the blower at the same time that the heat strios are energized. so the first thing that you need to do is figure out the sequencer that is keeping the fan running and get it replaced.
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