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Dryer fails to heat up. I tried replacing the glow bar with no success.

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  • Dryers Master
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Is the ignitor glowing?you'll need a meter,if it isn't glowing unplug the dryer and check the sensor it's to the left of the ignitor,you can check the thermal fuse located on the blower wheel housing,if those are ok you'll have to do some checks to see why power isn't coming down to these parts,if it's glowing check the gas coils or you could have a bad gas valve,if you need more help send the model number and let me know if the ignitor is glowing or not

Posted on Sep 04, 2010

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  • Master
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Hi

If your dryer is not heating, then check if the power cord is plugged into the wall. It may be loose or disconnected. Inspect the fuses and circuit breakers they may have burned out or tripped. Usually, dryer will still tumble but not create heat if a fuse or a circuit breaker is not working. Now, check whether the heating element in your gas dryer is burned out by using an ohm meter to check for continuity. If the continuity is not there then you would need to replace the element. After checking the element, check out the thermal fuse to see if it's burned out. The thermal fuse is attached to the exhaust duct on the back panel of the gas dryer. It's usually surrounded by a black resin material situated in a housing made of white plastic. If the fuse looks like it's blown, then it needs to be replaced.
Now, check the igniter, there is a plastic connector attaching the igniter to the burner. Disconnect this and place the probes onto the two contacts of the igniter. The meter should read under 100 Ohms of resistance. If the reading is above 100 ohms then igniter is bad. If the igniter passes the test then you need to test continuity on the flame sensor. You should have continuity between the two contacts. If not, then you need to replace the flame sensor. The sensors are usually located close by the igniter so are easily visible. Hope this helps...
Daniel

Posted on Sep 04, 2010

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1 Answer

No heat from my whirlpool dryer... is there a thermostat? already replaced the glow bar


Yes, there is a thermal fuse. It's a one inch strip of whitish plastic with two terminals sticking up on each end. Just look around behind the blower housing, it's usually somewhere around there.

Check that thermal fuse for continuity if your glow bar isn't glowing at all.

If your glow bar IS glowing, then the culprit is usually the coils for the gas valve.

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1 Answer

After ten minutes the dryer stops and the filter light is lit


The glow-bar system sends electric current through a heating type of element until it glows hot enough to light the gas (this is used on most older style dryers) An I.R. sensor (infrared sensor) determines when the glow-bar is hot enough to light the gas, it then sends a signal to the gas valve to turn on.

To test this system, open the front cover where the burners are; start the dryer in the heat cycle; you should see the glow bar getting red hot (the glow-bar sits inside the burner box just above the burner tubes - there are two types; a round one that has spirals, and a flat one that looks like half of a coat hanger except smaller. If you have a hard time identifying them go look at the pictures of them in the store section) If nothing glows you will need to take a voltage reading across the glow-bar leads (there are 2) as you first start the dryer. No voltage means it's something else. Voltage means replace the bar (a replacement glow-bar should be kept in stock).

If the glow-bar lights and does not go off then the I.R. Sensor has failed. (I usually replace the glow-bar along with the I.R. sensor because one will take the other out, and it's just good maint. procedure to do as such.)

If the glow-bar lights for about a minute then goes off and you do not hear a click sound come from the gas valve (this click sound is the coil in the gas valve opening) then it's probably a bad gas valve coil (see below). If the glow-bar lights, then turns off (in about a minute) and the gas valve clicks on (and you can hear and/or smell that the gas valve is open) the burner tube holes are plugged and/or the glow-bar needs to be adjusted closer to the burner tube. To clean the burner tubes, you can either shoot compressed air into them, or remove them and run water through them. If it's an older dryer it's best to remove them and run water through them so as to get all the compressed lint completely out.
If you have a spark ignition (looks like a spark plug wire from a car...in fact it is.) The way that this system works is, instead of lighting the gas with a glow-bar, it lights it with a spark. To test the system, open the burner cover, turn the dryer on in heat mode, you should hear the gas valve click, and the spark igniter sparking, (in fact, it may even light the gas, but then goes right back off.) If this is the case then most likely the ignition cable is bad. Most people think that just because they can hear the spark, and see the gas light that the cable is OK, however, the ignition module sends a small amount of voltage the opposite direction through ground, through the fire, and through the high voltage ignition cable back to the ignition unit to let it know that the gas has lit. If the ignition cable has a even the slightest crack in the carbon core cable; that small amount of voltage cannot jump that crack like the higher voltage.... So replace the cable. (if it's a weekend and your faced with a downed dryer; either buy one from an auto parts store, or borrow one from someone's car...) The other thing that it may be is plugged burner tubes, if it looks like there is a lot of lint in the burner compartment you may want to try blowing out the burner tubes or removing them and rinsing them out with water.

Check circuit breaker. If it's a 220V machine be sure you have all legs of your power.

Check your neutral leads (I can't tell you how many times I've seen wire nuts come loose...) I've also had alot of power cords (especially 120V) go bad; check them.

Check control fuses, there's usually more than one. Sometimes they put them in the computer control board.

If there is a transformer in the main circuit (There may be two-one for the heat circuit, the other for the control circuit) be sure to make sure you have incoming and out going voltage according to the schematic voltage or it should say on the transformer.

Make sure door switch is adjusted properly or hasn't failed.

Check belt or chain.

Check the conduit going into the motor, sometimes older motors get hot and the mount fails causing them to rotate in their craddle and pulling out the conduit and wires. After repairing the wires you can run a large hose clamp around the motor so as to secure it. This will keep you going long enough until it's replaced.

If the dryer works only while you hold the start button on, it means the start circuit in the motor has failed (120V - 220V single phase system) I've seen people put tape over the button, however this should only be a temp. fix...replace the motor. For a three phase system, it's most likely the start relay is bad.
Be sure to check the main start contactor, these seem to fail quite frequently, they are usually located behind the dryer in the rear control panel.

Dec 21, 2010 | Bosch Dryers

1 Answer

Gas dryer turns on but won't heat up?


There is a little cap on the front of the dryer you can pop off and look in to see if the glow bar is glowing when the dryer calls for heat. If the glow bar does not glow chances are it needs replacing. If the glow bar is glowing it could be a number of things.
It could be one of the coils on the top of the burner is burnt out. It could be the glow bar sensor is not working. (a black box with two wires comming from it located on top of the burner funnel). It could be a thermostat not working.
The first thing to check and this has happened before. Make sure the temperature switch is set for heat and not air dry.

Dec 28, 2009 | Maytag Dryers

1 Answer

Have a Whirlpool Gas Dryer - model # lgr7646a spins but no heat


Thre is no pilot light. This dryer uses an ignitor (glow bar or coil).
Open the lower front "door" (small access door) and turn on dryer.
If the ignitor does not glow (bright orange), then the ignitor needs to be replaced ($60).
If it does glow, then the gas valve needs replacement ($60).
If it isd the valve, the internal spring is stuck. Do not try to repair it, you must replace it.

Sep 25, 2009 | Whirlpool Dryers

1 Answer

Dryer turns on. no heat and timer does not advance?


sounds like glow bar or photo sensor not working properly. should be access panel to veiw ignition system, if glow bar turns white hot when dryer is started, try to clean face of photo senser and re-start. unplug dryer before cleaning sensor. timer will not start until dryer comes up to temp.

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1 Answer

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probably not as these rarely go. More likely is that the glow bar ignitor on the gas valve has failed. Unlike old gas models, today's dryers do not use a standing pilot but a glow ignitor. This is the weakest link in the system. Part number fsp-279311

Apr 09, 2009 | Dryers

1 Answer

Dryer will not get hot.


There is a glow bar that ignites the burner. The glow bar probably needs replacing, check it with an ohm meter, usually you can see if the glow bar is broken because it is ceramic and is usually broken. Be carefull when replacing the new one not to touch the part that glows



Jan 09, 2009 | Roper REX4634KQ Electric Dryer

1 Answer

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Your gas valve solenoids are bad, or else the igniter (glow bar) has failed. Hope this helps!

Dec 31, 2008 | Frigidaire Dryers

1 Answer

Maytag Gas Dryer MDG8600AWW does not heat up. Could it be the glow bar ignition? When the dryer was beginning to fail, it would heat up for a few minutes then the heat would die. Now it doesn't heat up at...


If it was heating occasionally after you first noticed the problem, most likely not the ignition glow element. I am having the same problem and am looking at replacing the gas valve. I used to be a Sears Repairman. I verified that both magnetic coils are energizing when they are supposed to, but often the gas won't flow. Also, I hear a clicking noise internally on the gas valve.

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1 Answer

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It sounds like your GLOW BAR gas igniter is bad. This is an electric powered heater coil that , when it glows red hot, ignites the gas burner. This part normally fails at least once during a dryers normal service life. If you are handy, you may be able to replace the part yourself. Otherwise, have a technician look at it. If you want to DIY, go to an appliance parts store . Remove and observe the GLOW BAR from your gas dryer. If one of the metal element appears to be burned open,replacement is necessary.. Show the part, along with your dryer maker, model, and serial number, to the store employee. This person can give you helpful info along with a new part. If the GLOW BAR is NOT burned out, seek out a technician.

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