dryer not heating proper

hi there. sorry I was so light on the particulars on the last post
I found the correct model number

When I set the temperature to delicate and the timer to a full cycle on delicate the drum turns good but I do not get any heat.
When I set the temperature to normal and the timer to full normal cycle the drum turns and I get heat however it is hard for me to tell if it is full heat
I hope this helps
rob

my model no. is mdg9206bww maytag gas dryer
my serial no is 40693680zs

replaced duct exhaust and cleaned lint complete
dry ignights but will not stay hot continues to tumle

jeffgalas

— Begin quote from jeffgalas;141248

my model no. is mdg9206bww maytag gas dryer
my serial no is 40693680zs

replaced duct exhaust and cleaned lint complete
dry ignights but will not stay hot continues to tumle

jeffgalas

— End quote

Sounds like the problem is a bad gas valve coils.

Here are the breakdown diagrams and http://www.appliancepartspros.com/partsearch/model.aspx?model_id=47092

Gene.