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Re: Picture you sent
Yes i sent you a pic of an electric dryer. there should be full continuity thru those switches when the dryer is cold. usually when the fuse goes out it is because one or more of the thermostat switches are bad. there are more switches on the gas heater housing too.
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The heater could be giving you a false reading, did you actually remove the heater and touch each section with you finger to find a break. I will help you more if you need it, also make sure you have 220 volts to your dryer
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...
if you thermal fuse is gone then the dryer will not start(you can bypass the fuse by taping the wires together and test it, then buy a new fuse as if left bypassed it will cause a fire), it is recommended to change both. Here is a picture hope it helps Tim:
There are several things that can cause a gas dryer to have
no heat. I can walk you through how to test the components if you have a
bit of mechanical ability and an ohmmeter to test with. I will list the
suspects here but to narrow it down we need to do a bit more
Thermal fuse or thermal cut off - these two
components can trip if too much heat builds up due to lack of air flow,
usually a restricted vent.
Gas valve coils - these can fail as a
result of age
Gas valve ignitor - This can fail as a result of
age or vibration
Control/timer contacts - Fails due to age or
Let me know how deep you want me to go as far as
troubleshooting with you on these and I would be happy to assist.
With the limited information you gave I will assume this is a gas dryer that the flame starts for a minute or so and then shuts off. This problem is going to be your safety valve coils...basically they get old and over time of heating then cooling develop a short when they heat up...It may appear the gas lights to start but then goes out until the safety valve coils cool back down. Here is a picture of the coils This The coils are mounted to the gas safety valve, This should solve your problem. Hope this helps, Please feel free to comment again if you have any further questions or concerns. Good Luck! Mike
does the dryer heat initially when you first turn on the dryer Or no heat at all?
the first thing i would check is tthe thermal fuse thats located on the back of the unit. test it with a multimeter and see if it has continuity, if it doesnt then replace that and your operating thermostat. the check to be sure you venting to the outside of your house is not clogged
Q - My electric dryer runs but will not heat, what could stop my dryer from heating? A - Things that could stop a electric dryer from heating: - house fuse or breaker ( needs two of them ), heating element, burnt wire, thermostat(s), thermal fuse ( not all models ), motor heat switch, timer, selector switch, burnt power cord/plug. A ohm meter test for these parts is here. Q - My gas dryer will not heat, what could stop my dryer from heating? A - Things that could stop a gas dryer from heating: - glow bar igniter, thermal fuse ( not all models ), coils on the gas valve, gas valve, thermostats,motor heat switch, timer, selector switch, sensor. A page for checking gas dryers is here. Meter testing and usage tips. 1. Power supply-check power supply at terminal block where cord enters the dryer. Should read 240V. If you read 240V here, tested with a volt meter, unplug dryer and test components with ohm meter. 2. Thermostats-Cycle and safety thermostats-read them with an ohm meter. Should show continuity . How common thermostats work. 3.Timer-The timer has a set of contacts that pass voltage to the heaters. If you can not determine by wiring picture what they are, check across the two terminals with the largest wires on them. The heater wires are almost twice as large as the others. You should read continuity with timer in heat mode. 4. Thermal fuses-In recent years the makers of dryers are using thermal fuses to let you know something is wrong with your dryer. They are generally non resetting and have to be replaced. The thermal fuses are located on the heater element housing and should read continuity if read with an ohm meter. Most blown thermal fuses are the result of vent/air flow problems or a grounded heating element. 5. Selector Switches-Read the wiring picture and determine which switch is closed. You should read continuity across closed switches. 6. Safety Switch on Motor-There is a safety switch on motor to insure that heaters can not come on unless motor is running. It is normally open when the motor is idle/not running, and closes when motor runs. In order to check with an ohm meter, remove the two large wires on motor switch and make them electrically safe. Tape them. Plug the dryer in and start motor. Check continuity across the terminals on the motor switch you removed the heavy wires from. If it is ok you should read continuity. Remember that the smaller wires in a dryer carry the 120V and the large wires carry 240V. There is no voltage on these two terminals with wires removed. It is ok to test with ohm meter. 7. Heat elements-Test heater element with an ohm meter. You will read continuityacross a good element ( 8-12 ohms is an average element ). But darn it, I don't have a Ohm Meter.... To check the thermal fuse - You can bypass the thermal fuse (just connect the 2 wires together) for testing purposes only.To check the thermal cut-out - You can bypass the thermal cut-out (just connect the 2 wires together) for testing purposes only. To check the thermostats for continuity - - You can bypass the thermostat (just connect the 2 wires together) for testing purposes only. To check the Element: Try removing element and physically looking at the element wire for a break in the wire.
unplug dryer , remove back panel and you will see a thermo link in about the middle of the back of dryer with a vom test continuity of the link this is a very common problem . if no continuity replace thermo kink . if it tests good remove access pane in front of dryer and turn the dryer on to a heat cycle, see if the ignitor coil gets red hot. if it doesn't then the ceramic coil is bad. these are the 2 most common problems with gas dryers. if still no good write back