Whirlpool Gas Dryer - No heat


  #1  
Old 12-11-04, 07:45 AM
OurHouse
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Unhappy Whirlpool Gas Dryer - No heat

Hi,
We have a Whirlpool gas dryer that tumbles, but doesn't get hot.
We replaced the ignitor (since the old one was not glowing at all). This new ignitor also does not glow. We know we are getting gas to the unit - (our first attempt at replacing the ignitor left a loose connection and we could smell gas).

We checked for continuity across the solenoids - seemed ok.

The only part we can think of now that isn't working is the flame sensor - could a bad flame sensor cause a brand new ignitor to not glow at all?

We have also cleaned all vents & checked the circuit breakers.
 

Last edited by OurHouse; 12-11-04 at 08:17 AM.
  #2  
Old 12-11-04, 09:15 PM
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Hello OurHouse. Welcome to my Gas Appliances topic and the Do-It-Yourself Web Site.

Flame sensor may be the cause. But so can the solenoids, timer control or gas valve. Best bet would be the flame sensor. Test it for continuity. Circuit should be closed when cold and stay closed when warmed.

If the sensor gets too much heat from the flames in the burner shroud, the electrical circuit will be interupted and the burner will shut down. That can happen for any one of several causes. Poor air flow, overgassed burner flames, restricted venting, etc.

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Read the manufacturers online web site for product information, problem possibilities, causes, solving methods, part locations, disassembly, reassembly methods, repair procedures, pictorials, schematics, downloadable repair and or owners manuals which may be available online.

Retail appliance parts dealers can also help determine what the most likely possible problem may be. They will need the make, model and serial numbers.

Appliance parts dealers are an excellent source for original replacement parts and problem resolving matters. Dealers are listed in the phone book under appliances.

Read the existing questions on the subject of dryers. Doing so will quickly provide you with answers to questions & provide additional information on how to resolve the problem. Dryer help info: http://forum.doityourself.com/showthread.php?t=159481

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  #3  
Old 12-30-04, 06:43 AM
OurHouse
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Ok, we replaced the thermal fuse which ended up solving our problem.
BUT, we now notice, the control knob, when set to a dryer setting, does not advance. We also remember that when the dryer stopped working the first time (bad thermal fuse) it had been running for about 4 hours (the cycle never stopped). When the control knob is set to a timed dryer setting (ie 40 minutes) it advances. Is this a new problem and if so what do we replace? Is it a timer problem or a thermostat problem?

THANKS!
 
  #4  
Old 01-02-05, 06:20 AM
OurHouse
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Any ideas if this is a thermostat problem or a control knob problem? Can I check for continuity to verify?
 
  #5  
Old 01-02-05, 07:24 AM
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Hello: OurHouse

The diagnostic process is out of sequence....

...Whirlpool gas dryer that tumbles, but doesn't get hot.
We replaced the ignitor (since the old one was not glowing at all). This new ignitor also does not glow.
Does the ignitor now glow??? Yes or No?
If ignitor does not glow, burner will not ignite, thus no heat will be provided and timer will not advance in auto dry because no drying is taking place.

Did you replace the flame sensor??? Yes or No?

If the ignitor is new and does not glow, the flame sensor may be defective. (Open Circuit) Flame sensor will need to be replaced. Once replaced, ignitor should glow and the glowing will allow burner to operate providing heat.

If ignitor glows, (you'll hear the first solenoid click) but no second click (ignitor turns off at that point) the solenoids need to be replaced. Do not assume solenoids are working by doing any type of testing.

Solenoids may not be operating or working correctly or not doing so constantly. Heat in the coils of wires that make up the solenoids creates it's own internal short which drops down the solenoids internal disk, stopping the gas flow.

Yes. The timer may be malfunctioning in one cycle but not another cycle or all cycles. Yes. The thermostat may be defective too or also. Moisture sensor too.

Attempting a repair should not be jumping around testing and or part replacing without know what part is most liekly to be causing the problem. Difficult method to use to attempt repairs, time consuming, in accurate and expensive ways to accomplish any repairs on any machine. Dryers are no exception.

About all the info I can provide to assist you with such repairs.

Regards and Good Luck
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  #6  
Old 01-02-05, 07:48 AM
OurHouse
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Replacing the thermal fuse has the dryer now tumbling & heating/drying properly. The control knob is not operating properly (advances in only the timed drying cycle - it does not advance on the "dryer" settings ). I believe a different problem (ie thermostat or timer in control knob) caused the thermal fuse to blow in the first place.

Summary:
1. Gas dryer was tumbling not heating.
a. Ignitor replaced. Still did not glow.
b. Thermal fuse replaced. Gas dryer tumbling AND heating.
c. Flame sensor was never replaced.
2. Realize control knob not operating properly. Think this caused thermal fuse to blow. Need to know what/how to test. I believe it's either a timer problem or thermostat problem. Looking for input.
 
 

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