[dstout8267]

Timer Sticks In Normal Cycle, Runs Forever, Had Service Out, Needs
New Timer, Part Ap4043083, Ordered It, Need Install Instructions,
Looks Easy But Do You Have Any Help?

[Gene]

Do not rush with the timer.

One of the most common cause for such problem is an obstructed air flow. The first thing I would do is clean the vent all the way from the dryer back panel through the vent outlet. Make sure the outlet flopper is opening properly. Take the dryer apart. Check the blower wheel and clean all air ducts inside.

If there is nothing wrong then replace the high limit thermostat (#17 on the diagram) and the cycling thermostat (#8 on the diagram).

Here is the Service manual.

- The high limit thermostat Part number: AP4036956

- The cycling thermostat Part number: AP4037199

Here are the breakdown diagrams and Replacement parts for MAYTAG MDG6400AWW | AppliancePartsPros.com

Gene.

[dstout8267]

Burner does not come on all the time either, runs for about 10-15 sec and skips times that ignitor comes on some times, several times ignitor lights
but flame does not happen. Ran it on timed cycle which appears to advance,
normal cycle does not. I did replace high temp limit above burner #17 on
drawings. Again have maytag. Hoping its not the coils of the burner. Timer
still does not advance on normal dry cycle. Air is flowing well outside at vent. had a service guy out but he really did nothing for $40. Suppose I'll call another one.

[Gene]

Sorry for the delay.

...Burner does not come on all the time either, runs for about 10-15 sec and skips times that ignitor comes on some times, several times ignitor lights
but flame does not happen. Ran it on timed cycle which appears to advance,
normal cycle does not...

Very likely the problem is a bad gas valve coils.

- The coil kit Part number: AP3094251

Gene.