Maytag MDG9700AWW doesn't heat! The dryer operates fine, but without heat ... a little heat at the start of the cycle, but that's it. I ran a diagnostic check and it showed codes 02 and 10. 02 appears to be the thermistor, correct? Where is it located and how do I get to it, so I can replace it? Am I on the right track with the diagnoses? I disconnected the dryer ducting and inspected it. It did not have any accumulation of lint. I also ran the dryer without the dryer ducting attached and had the same result. The ducting from the dryer to the exhaust vent is approximately two feet. I am getting a strong exhaust from the vent.

Retest the breaker. One side can trip without moving the handle. This will stop 240 to the element but still operate everything that operates at 120 volts.

O2 is a not heating error. Unplug the dryer and check the heating system components. For an electric dryer, check the house circuit breakers to see if one has tripped. For a gas dryer, make sure that the gas supply cut-off valve is fully open.

ELECTRIC Dryer no heat or little heat, or shuts down to fast:

Check your venting and lint basket. Check blower for lint build up and blower wheel obstruction., test by trying to turn the wheel manually by hand (should be easy) May have to remove cabinet or front/back plate to get to it)

Next check the heating element itself with a meter for continuity OHMS CLOSED CIRCUIT. If not its defective or has a short if its grounding out? Which in turns causes blown fuses or thermostats or overheating.

Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. 220 because if u only get half or 110 volts you will be able to run the machine which uses only 110 to run motor but not the heater which uses a full 220,

Check the thermal cut off, the cycling and the hi limit thermostats.
For continuity or OHMS. If no ohms or resistance they need replacement.

In some dryer's the control panel relies on a thermistor rather than a CYCLING thermostat to regulate the drum's air temperature by monitoring the component's resistance changes; resistance goes down as temperature increases and up when temperature decreases. Once the drum's air temperature reaches a certain level required to dry clothes, the control panel shuts off the heater. The panel will turn the heater on again and begin another heating cycle when the thermistor indicates that more heat is needed to keep the air temperature constant inside the drum

Lastly check your moister sensor. ( located inside the dryer door usually) Especially if machine seems to shut down early and clothes are still wet.
Test with a meter at room temperature and it should show continuity.
A failed moisture sensor will affect the dryer run time in the automatic moisture sensing cycle but it will not affect the heating of the dryer or the timed cycle. Which are reflected by the thermostats.

Read more :http://www.ehow.com/info_12203962_check-dryer-thermistor.html

If there is no voltage at the ignitor, some safety device is prohibiting it. If the coils are good, it's being prevented by the control board or the first solenoid of the gas valve.

its either the hi-limit switch is weak on the burner tube,or the gas valve coils on the gas valve are weak and can no longer keep the gas valve open to supply gas,if they appear warm after operation they are most likely bad

Hi,

There can be many reasons why your dryer will not start or turn...

The most common causes are the belt breaking or jumping off, or the motor going bad...

Here are a couple of tips that I wrote will help you to figure out why your dryer will not run...

Dryer Repair - The Dryer is not Turning

Dryer Repair - The dryer will not start


heatman101
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I got the same problem. A technian came over and checked, he told me that it is gas valve assembly problem. the gas valve needs to be replaced. it is very costly, the part is $253

The Complete Service manual is at the link below and it describes the disassembly process and full diagnostics. Download and save it. Hit Free User and wait for the Download button to appear.Good Luck.

MDG9700

your tumbler is sticking and needs to have the rollers and skid plates replaced

open dryer, turn it on and make shure the elements get hot. right beside or in front of it, there is a quarter sise thing with two screws. that is the thermistor. you can get it check for free most any ware. yes most likely it is the thermistor.

be sure vent is clear all the way to outside try a load with vent disconnected ..also if gas dryer may be a problem with burner reigniting after heat up if so try replaceing both coils on burner valve