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If you are having problems with your gas dryer not heatingthe most common problem is that the ignitor goes bad. Even though it glowssometimes it is still not working properly.
if you dryer is gas check out this gas no heat tip....
If you have an electric dryer, you can have many differentthings that can go wrong causing the dryer not to heat.
check outthis electric no heat tip...
The 2 coils on the gas valve , need to be replaced . After the dryer runs for a short time , the coils get warm from the electricity going thru them . The weaker valve , shorts internally , not letting the gas go thru . After the dryer cools down , and the coils cool down , then the short will close ( giving continuity ) , until they warm up again . If you had given the model number , I would have given you the part number .
The igniter is the part that ignites the gas in the Maytag gas dryer. Long time a go the dryers use to have a pilots. The pilots where on all the time, even when the dryer was not been use.
This wasted a lot of gas and a new design was needed. That is when the igniter or glow bar as is also known, came to be. A bad igniter could be the reason for your Maytag gas dryer not heating.
The radiant sensor is a small black box that attaches to the combustion funnel. The job of the radiant sensor is to allow the igniter to glow until it is real hot, then it shuts the igniter off and opens the gas valve to start the heating process. A bad radiant sensor could the the reason for your Maytag gas dryer not heating.
The gas valve has two coils or solenoids. These coils job is to open the gas chambers inside of the gas valve.
When one of the coils goes bad, the symptom is that the igniter glows, but the gas valve won't open to let the gas flow through the gas chamber to be ignited.
A bad set of coils could be the reason for your Maytag gas dryer not heating.
The hi-limit thermostat is located on top of the combustion funnel, and its job is to open the circuit to the gas valve if the airflow to the dryer is restricted for any reason.
The cycling thermostat is use to control the temperature inside of the dryer. It is factory preset at 155 degree, in other words it will open the circuit to the gas valve when the temperature reaches 155 degrees.
This thermostat is opening and closing all the time the dryer running. A bad cycling thermostat could be the reason for your Maytag gas dryer not heating.
The timer is the part that direct the electricity to the other parts in the dryer. This part works very hard and the contacts wear out and some times they burn out. If the timer contacts won't close, the dryer will not heat.
The motor switch is another safety device that only closes the heating circuit when the motor is running. When the motor is not running the circuit of the gas valve is open and the dryer will not heat. A bad motor switch could be the cause for your Maytag gas dryer not heating.
As you could see, there are a lot of parts inside of the dryer that have to be in good working condition for the dryer to produce heat.
Could be 2 things... either your heat source is out of repair or your vent is blocked. Since you say it only gets warm I'll assume the problem is with the gas coils inside the unit. These parts are replaceable
Since your hot surface ignitor is glowing, that means it is trying to heat, or that all the temp. switches are good and the timer is sending the signal. First check that there is actually gas pressure to the dryer. But the common problem is the coils on the gas valve. There are two, called the booster/holding coil, and the secondary coil. They are purchased as a set (part #279834 / $20.00) if it is the same as my mdg8600aww model. If that doesn't work, then likely the gas valve itself.
Sometimes those coils will open circuit when they warm up, and close when they cool down, giving you an erratic operation symptom.
you could have a blockage of lint either in the dryers front bulk head (where the lint screen is) or you could have a blockage somewhere in the vent line. check those and if you have a blockage remove it and that should clear up the problem