White Westinghouse dryer

[Kaitlyn]

Hello,
I was wondering if I could get some help pin pointing what is wrong with my dryer. I think it may be the timer but I'm not 100%. 
Timer stopped advancing on automatic dry so it was overheating. 
Started using timed dry which advanced and was working. 
Now the timer dry is advancing but no longer heating.
I know it's not my element as I changed that a few months ago. And I opened it back up to check it a couple weeks ago. It was fine and I cleaned all the lint out from everywhere to be careful.

[Hiroshi]

It sounds like you need to clean the exhaust vent, from where it connects to the dryer all the way out of the house- you have probably blown the thermal fuse.

[MA tech.]

Makes no difference that you changed the heater at one time. It could have failed again. Certainly possible with a badly restricted vent hose. Does the dryer heat up at all now? do you have any voltage readings at the heater. Is the heater mounted on back wall? What is the model number? m

[certified tech group 51]

 model number is.........( small drum roll, please )..