How to fix a dryer that won’t stay hot during the cycle or doesn’t get hot enough

Peter wrote:

We have a GE dryer model DDG7280SBLWW, S/N GL315788G. The problem is the dryer does not stay hot though the entire cycle for any of the cyles (automatic of timed). When the dryer is turned on for any cycle it initially gets hot and comes up to temperatur, vent pipe hot to touch but not burning hot, then the heat cycles off and does not heat back up. The dryer will run though the rest of the cycle and when it turns off the clotes are cold and damp. I removed the vent cap outside the house and cleanned the vent pipe and dryer to make sure we have sufficient air flow but no change in the dryer performance. We called a tech who came in and started replacing parts (i believe all the sensers, coils on the gas valve, timer & timer knob) but we still have the problem. They have sent differnet people to the house but it has been 2 weeks and the dryer still isn’t working. Wife near point of leaving. There is good and bad in all situations. Please help.

This is a classic symptom of a vent duct with too much backpressure. Vents can be clear of lint and still have excessive backpressure. You can easily test this by disconnecting the vent from the back of the dryer and run it again while observing the burner on/off cycle. I’m sure you’ll see normal heating operation.

Get the gory details on how to make a good dryer vent in this post:

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