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if you sere getting heat for like the first 15 to 20 minutes then no heat you have bad gas coils located on top of the gas valve,easy fix,remove the two phillips screws,lift the cover and pull off the wires to each coil and install the new coils,if the ignitor is glowing but no flame and the sensor is good most likely gas coils.
I have a MDG6700 with the same issue..all my research on this problem points to the 2 coils on the gas valve. Tomorrow i am going to change them (kit is about 30 bucks to get local)..coils test good but other postings about this dryer say one coil gets hot and is weak and close the gas valve thus stopping the heating process
Check the heating coil itself. It may be a bit of work to see but check for any breaks in the coil. If there are breaks in the coil there will be no heat as the electricity cannot go through. (like a break in a wire)
ALWAYS UNPLUG YOUR DRYER BEFORE ATTEMPTING TO DO ANY WORK ON IT.
Check to make sure you are getting full 220 Volt power to the dryer, if you are then:
Sounds like your problem may be with the heating coil.
Remove the back of the machine and try to locate the air duct going from the blower to the drum. Normally inside the air duct you will find the heating coil and the thermostats/thermistor.
Once you have located the heating coil, remove the two wires from it and check the coil with an ohm meter across the two terminals of the coil.
You should read continuity across the terminals, if not you will need to replace the coil as it is faulty.
If the heating coil is ok, then:
You can check the thermostat/thermistor by removing the two wires and taping them together with electrical tape.
If the coil heats up then replace the thermostat/thermistor.
DO NOT LEAVE THE WIRES TAPED TOGETHER AFTER THE TEST. This could cause a fire, as you have removed the safety of overheat from the machine.
I will include these two websites for parts and further help:
http://www.partselect.com/
http://www.appliancepartspros.com/index.aspx
Both also have chat assistance 24/7.
Good Luck,
Hope this helps
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Thank you
Remove the back of the machine and try to locate the air duct going from the blower to the drum. Normally inside the air duct you will find the heating coil and the thermostats/thermistor. Once you have located the heating coil, remove the two wires from it and check the coil with an ohm meter across the two terminals of the coil. You should read continuity across the terminals, if not you will need to replace the coil as it is faulty. I will include these two websites for parts and further help: http://www.partselect.com/ http://www.appliancepartspros.com/index.aspx Both also have chat assistance 24/7. Good Luck, Hope this helps
Maybe you already know this, but occasionally the coils will swell when you first turn them on and they expand to the point of arc'ing off the housing. This puts you right back to square one. I learned the hard way to buy the entire assembly when changing and not just the coil. Not sure if this is your problem or not, but worth another check. I believe the next step would have to be in the control system.
Could be a bad set of burner coils. Does the glow come on for a bit then goes out. And after a bit does same? Probably bad coils. If you were able to change ignitor, you can do the coils. Unplug first! The coils are the 2 black cylinder shaped devices on burner. They are held on with a bracket that has 2 phillips screws. You can probably take them to your parts house and they can ohm them out for you. Make sure to write down their position before removing them.
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