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Question

I have a ducane furnance and im getting a failure code stating the high limit or rollout switch open

Submitted: 320 days and 19 hours ago.

Category: HVAC

Value: $15

Status: AWAITING CUSTOMER ACTION

Posted by Robert 320 days and 18 hours ago.

Answer

Ok, what have you done so far? You will find the roll-out switch directly in front of the burners where they go into the furnace. There should be a little button on top and a couple wires going to it. If you have not pushed the button do so and tell me what happens.

320 days and 18 hours ago.

Reply

I did that and it still does the same thing

Posted by Robert 320 days and 18 hours ago.

Answer

Is this an upflow, downflow or horizontal furnace?

320 days and 18 hours ago.

Reply

it is a upflow

Posted by Robert 320 days and 18 hours ago.

Answer

Ok, Follow the wires that go to the roll-out swich. They connect to all the limit switches as they are all in series and see what you find. In your next post please include a model number and approximate age of the unit.

320 days and 18 hours ago.

Reply

model # cmpev125u5 On the control board the red led flashes 4 times the unit is about 1yr old

Answer

Ok, turn it off, wait a couple minutes and turn it back on then tell me what happens.

Accepts:
Expert:	Robert
Pos. Feedback:	100.0 %
Answered:	1/6/2009

HVACR Educator

Licensed Mechanical Contractor, 30 years experience, 20 years teaching experience

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Have your own HVAC question?

Question

I have a ducane furnance and im getting a failure code stating the high limit or rollout switch open

Answer

Ok, what have you done so far? You will find the roll-out switch directly in front of the burners where they go into the furnace. There should be a little button on top and a couple wires going to it. If you have not pushed the button do so and tell me what happens.

Reply

I did that and it still does the same thing

Answer

Is this an upflow, downflow or horizontal furnace?

Reply

it is a upflow

Answer

Ok, Follow the wires that go to the roll-out swich. They connect to all the limit switches as they are all in series and see what you find. In your next post please include a model number and approximate age of the unit.

Reply

model # cmpev125u5 On the control board the red led flashes 4 times the unit is about 1yr old

Answer

Ok, turn it off, wait a couple minutes and turn it back on then tell me what happens.

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