There are five major electrical parts involved in the heating process:

1. High limit thermostat (#17 on the gas valve break down diagram)
2. Cycling thermostat (#8 on the motor break down diagram)
3. Igniter (#4 on the gas valve break down diagram)
4. Flame sensor (#18 on the gas valve break down diagram)
5. Gas valve coils (#7 on the gas valve break down diagram)

How to find out which part causing the problem?

Pretty simple: all of these parts have to be tested for continuity in the above sequence.

The following article on our forum will explain in detail how to run a continuity test using either an analog meter or a digital meter - How To Check Continuity With Ohmmeter

If any of them is open – it has to be replaced.

Gas valve coils also could be tested by resistance. There are two coils – one with three terminals and one with two terminals.
1. Coil with two terminals should have 1220 ± 50 Ohms
2. Coil with three terminals if held with terminals in upper position:
a) across the left and the middle terminals – 1365 ± 25 Ohms
b) across the left and the right terminals – 560 ± 25 Ohms

- The part number for the high limit thermostat is AP275754

- The part number for the cycling thermostat is AP276896

- The part number for the igniter is AP3109449

- The part number for the flame sensor is AP2910747

- The part number for the gas valve coils kit is AP3094251

Here are the break down diagrams for the Maytag dryer Model MDG7057BWQ

Gene.

I'm glad you were able to fix it.

Gene.