Question about KitchenAid KGYS850LT Gas Dryer

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When the dryer is cold the heater flame will

Kitchenaid model kgys850GQ1

When the dryer is cold the heater flame will ignite (as normal) looks like solenoids are working. It appears that once the dryer gets to a certain temp the gas will shut off and the flame goes out. The igniter will occasionally heat up (glow) but the gas does not turn on to start the flame. This repeats itself until the dryer has cooled down again then starts working again (I am not sure to what temp). I have disassembled the entire dryer and cleaned every inch of the dryer and the exhaust tube to the outside. Any ideas what the problem is?

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The heating circuit is working perfectly except for the solenoid coils as indicated by the occasional glowing of the igniter but no gas is ignited. A gas valve closes as the solenoid coil weakens as it gets hot and does not open until it has cooled down. Replace both gas valve solenoid coils to get the dryer back into proper operation. The solenoid coils are part numbers 694539 and 694540 but also can be purchased as a kit here.

Posted on Apr 27, 2010

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I have a gas dryer and cloths come out wet


Does the dryer get hot? If so check dryer vent.
If it is cold check the gas supply. Next open the lower cover and look to see a red glowing from the ignitor when running. It it comes on and no flame then you probably have a bad gas solenoid. If there is no red glow then it is probably the ignitor.

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My whirlpool dryer comes on and runs good but it wont get hot can you tell me whats the problem


Hello there and welcome to fixya there are several things that could make this dryer not heat up
Here are the most common things

Thermal Fuse

If the dryer doesn\'t heat, but the drum
turns, check the thermal fuse(s). The thermal fuse protects the dryer
from overheating and helps to prevent fires. If the thermal fuse is
blown, it will have to be replaced.




Enter your model number to see parts for your dryer.

Help me find my model number


Gas Valve Solenoid

The gas valve has two or more electric
solenoids which open the valve to let the gas flow into the burner
assembly. If the dryer doesn\'t heat one or more of the solenoids may be
defective. If the igniter glows for 90 seconds but the burner flame
doesn\'t light, replace these coils as a set.


Dryer Igniter


If the dryer doesn\'t heat, the igniter might
be burned out. Check the igniter for continuity with an ohm meter. Dryer
igniters burn out over time, similar to a light bulb.


Heating Element

The heating element on an electric dryer can
burn out over time. If the dryer doesn\'t heat, the element should be
checked for continuity. The heating element cannot be repaired and must
be replaced if defective.


Heating Element Assembly

the heating element assembly on an electric
dryer can burn out over time. If the dryer doesn\'t heat, the element
assembly should be checked for continuity. The heating element assembly
cannot be repaired and must be replaced if defective.

Flame Sensor



Gas dryers have a flame sensor to detect the
heat given off by the flame. If the dryer doesn\'t heat, the flame sensor
might be defective. Check the flame sensor for continuity. This is not
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High Limit Thermostat


Although not common, if the dryer doesn\'t
heat the high limit thermostat can be defective. It can be checked for
continuity. If the thermostat is "open" the dryer doesn\'t heat.


Cycling Thermostat




The cycling thermostat regulates the
temperature of the air in the dryer. If the dryer doesn\'t heat it may be
caused by a defective cycling thermostat. This is not common.


Main Control Board

The main control board is normally not at
fault when the dryer doesn\'t heat. Check all of the other components in
this troubleshooting guide before replacing the main control board. The
main control board cannot be tested easily and must be replaced if it is
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Timer
The timer is normally not at fault if the
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1 Answer

No Gas Flame


Very common problem. The solenoids when cold will sometime work once then get hot and fail. Replace the coils. I made a short video which shows how it works and how to replace the coils on a similar dryer with the same type of solenoids:

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1 Answer

Kgys750gq0


This dryer has automatic gas assembly. No pilot light. The gas assembly receives power from the control thermostat and fuse mounted on the blower. All of the components are energized at once but the gas will not be ignited untill the glowbar has reaced 1800f and tripped the flame detection sensor mounted beside the burn chamber. Once that happens the ignitor becomes a self generating thermocouple allowing power to energize the solenoids. So what goes wrong? Fuse blown from clogged filter chute, open flame detector, bad glowbar, iffy solenoids that work once then get hot and fail only to work again once they cool off. Here is my home made video showing how it works:

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1 Answer

Lighting pilot light on kitchenaid dryer


It is all automatic, when you press start the power is sent to the gas assembly (if the timer is set for heat). The power originates from the cord to the timer to the temp control (on the blower housing) to the fuse next to the control, and to the gas assembly. The solenoids ignitor and flame sensor are all energized at once. The solenoids cannot release the gas unless the ignitor drops out of the circuit. That is the job of the flame sensor. Once the sensors bi-metal bends and opens the circuit, no more power goes to the ignitor< hoever, once the ignitor is glowing it generats a signal and becomes a thermogenerator with holds open the solenoid (holding coil) If for some reason the gas did not ignite the glow coil will cool off and shut down the solenoid. So what can go wrong? Lint buildup in the blower housing cause the fuse to melt. No power can be sent to the gas assembly. The flame sensor is open and not allowing power to the ignitor, the ignitor is open and not glowing. Old timey dryers had a pilot light. You hold down on the red lever and light the flame. Then release the lever and the pilot stays lit. I doubt if yours has a standing pilot. How modern gas dryer work:

Feb 24, 2013 | KitchenAid Dryers

1 Answer

Rinnai gas heater not staying ignited


Blocked pilot flame too small or thermocouple needs replacing

May 27, 2012 | Heating & Cooling

2 Answers

Maytag clothes dryer flame won't stay lit


Usually this is the two gas valve solenoids, though it can also be a bad flame sensor or thermo. The solenoids are easy to change, they are right in front and usually have two screws holding them down. Order new solenoids by model number. Once you have the new ones you will see how they look and where they go on your gas burner. Just make sure you make not of the wire positioning and install the new ones the same way. Usually 3 wires on one side and two wires on the other. Parts are pretty cheap. Before I replace these I put an electrical testor on the solenoids to test if there is 120 volts coming in when the burner stops working. If their is 120 volts and the ignitor is glowing then you definitely have bad solenoids. Good Luck, Appliance Specialists.

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2 Answers

My heater blows cold air. any ideas?


Your unit has a diagnostic light on the circuit board. You need to look thru a small viewing port to see it. Once you count the number of b links, remove the lower panel and look at the wiring diagram for an error code chart. Then read the following to give you some ideas what to do.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

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1 Answer

Kitchenaid Gas Dryer will not heat. Model KGYS850GQ1.


Sound like the therm switch under back cover. They are small round and silver with wire on each side, also one is white around 2 inches long with wire attached to each side. check with a tester to see if good, if not jump from one side of wire to other, plug dryer back in and turn on, if it works change switch, this should solve your problem, cheap easy fix.

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1 Answer

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Ended up replacing the solenoids and the burner ignited, flame stayed on. Problem appears to be solved. Thanks for your help and posting.

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