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Won't Heat -Maytag Gas Dryer Model MD-4 Intellidryer

It's not heating up - could be cycling thermo, druer temp switch or radiant sensor? In using my ohm meter do I need the elecrticity on to check the continuity? Which one should I check first?
I've got access to the switches and just need experienced advice before proceeding. Thanks

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  • Anonymous Feb 21, 2008

    My 4 year old Maytag Duet dryer won't heat up. Takes at least 5 cycles of air drying to get one load dried.

    Damp in Illinois



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Once I paid my gas bill--mine started working normally again.

Posted on Feb 02, 2008


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I have a gas dryer, model MDG7657AWW that will not stay heated. Every time I put it on, the flame comes on for about 21 seconds & then shuts off. I replaced the igniter, hi limit thermostat, cycling t

On a gas dryer the heat normally only comes on for 30 seconds or until the drum temp reaches 160f at which time the flame is shut down by the cycling thermostat. The drum temp then starts to drop. When the drum temp reaches 105f then another blast of heat is issued for 30 more seconds.That is how they work. Put it all back together and trow a load in there.

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More than limit switches if burner is turning on but heating is poor you should check cycling themostat and then blower motor, lint filter and parts comprised in blower assembly.

When the problem is the high limit, there is no heat at all.
When the problem is radiant sensor, there is no heat at all.

Poor heating means either: defective cycling thermostat; clogged air ducts; defective blower system, problem with timer or temperature selector.

If the heating turns off in the middle of the cycle check also door switch.

Here Cycling thermostat:


The cycling thermostat is located in the blower assembly. Here removal instructions. Disconnect power first:


The thermostat can be tested using a multimeter. Set the multimeter on impedance (Ohms). Good thermostat will read about Ohms at room and will read open (infinity) at 150F.

Once in there also check the thermal fuse and check blower assembly. Remove lint and make sure blower is working. Thermal fuse is tested reading impedance across its two contacts. Remove fuse from circuit and touch with multimeter probes fuse's contacts (same for thermostat). If fuse is good it will read zero Ohms or very little impedance. a bad fuse reads infinity.

Check also the exhaust. Make sure there is no blockage.

Operations are illustrated from page 72 of service manual: Here the service manual.


About the flame sensor, that is a part that rarely fails. If the dryer ignites the radiant sensor is not responsible for the fault.
The radiant sensor is mounted in parallel with the coil.

When temperature is reached the sensor opens up allowing power to burner valve (valve 2). Testing the flame sensor like a thermostat is difficult because it opens up at high temp. I read volts while operating. I suggest users carrying only maintenance that can be performed with power off.


If the burner shuts down at random more than the sensor check the door switch. Run a cycle with door switch contacts jumped.

Start checking cycling thermostat and air ducts, those are problems that usually cause low heating.



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I have a kenmore gas dryer, the drum turns but no heat, I replaced the radiant sensor and the control thermostat but still no heat?

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I have a maytag gas dryer model no# ldg7314aae.The dryer runs but there is no heat. the dryer vent was cleaned as well as the interior of lint and still no heat.I was wondering where to start as far as...

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1 Answer

Maytag Gas Dryer doesn't heat up

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