Maytag MGDB400VQ0 repeated no heat ( TCO & Hi limit failure)

[Bobby Osburn]

repeated failure ( every couple weeks) of my TCO and or Hi-limit fuses.  started about month ago. 

seems to be a not so common problem and looking for solutions.

[abaesemann]

Venting plugged or partially, kinked?

Good air flow?

Part number: AP3873703

[Bobby Osburn]

blew out vent lines ; not kinked.

is there another cycling sensor in line that should be replaced w/ the TCO & hi-lo?

[abaesemann]

How about the air coming out of the dryer, not hooked up to vent, good air flow, if yes then possibly these.

 

Part number: AP2975888

Part number: AP3919451

[Captain Dunsel]

There is a service pointer on this problem.Maybe someone can let you know about it.  

Technical Service Pointer #: W10602120 

[Bobby Osburn]

got it off the web.....thanks

[Bobby Osburn]

why would this start occurring when unit is 5 yrs old?

[abaesemann]

Looks like you need a burner scoop, burner funnel and new thermal cutout and hi limit, does not say why, Does mean there was a problem though.

Part number: 8573824 

Part number: 8573010 

Edited March 18, 2016 by abaesemann

[abaesemann]

From the look of the pictures the hi limit and thermal cutout are being relocated on the new funnel.

[Bobby Osburn]

yes, seem to be moving off of directly over the flame. need to check 

[PlugNickel]

Had one of these yesterday, probably the fifth or sixth time seeing one.

I never saw anything different about the burner scoops on the first two so all I do now is drill a hole in the burner can and rotate it as stated in the Service Pointer.  Install new hi-limits(both).

And I check and clean the venting(a fair amount of lint yesterday).  Also there was a piece of solid pink foam insulation from the house being resided at the vent outlet flapper.  It did not take up the entire space but possibly enough to impede airflow and open the hi-limit along with the lint in the vent.  And cut off the cross members behind the flappers at the outlet.  All they do is catch lint. 

I am a strong believer in any time the hi-limit on the burner/element can is open there is a reason for it. 

Lint screen had a little bit of build up on it and cleaned that also.