Question about Kenmore 74602 Gas Dryer

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Not enough heat

The pilot will glow... ignite the gas... run for 15 to 30 seconds and then go out. It will wait about 5-10 minutes and start the cycle again.
It's taking forever to dry a small load. I replaced the thermal fuse and
another sensor that was next to it and no luck.

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  • john_myers Nov 15, 2008

    I'll give it a try and see if it helps.

    Thanks

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Have you changed the heating coils

Posted on Nov 15, 2008

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Why is my Kenmore 500 series gas dryer won't heat up, no flame.


Gas Dryer no heat: or shuts down soon after heating CHECK:

Thermal Fuse
If the air flow in the dryer is restricted, the temperature in the heating chamber can get hot enough to blow the thermal fuse. If the fuse blows, it cuts power to the coils that control the gas valve. The fuse is usually mounted to the exhaust duct just inside the back panel. You can check its continuity with an ohmmeter. If, after disconnecting the fuse, you get any reading other than 0 when you touch the leads of the meter to its terminals, it has blown. There's no way to restore it -- you'll have to install a replacement.

Igniter and Gas Valve Coils
TEST with a multi meter: The igniter is an electric conductor that works like the element in an electric heater, glowing hot enough to ignite gas when you turn on the dryer. This conductor can burn out, and when it does, it may glow, but it won't get hot enough to ignite the gas. At times it may give a reading of continuity yet fail mechanically and not get hot enough to ignite flame though it gets hot and glows and even may show Ohms or continuity ( close circuit) ?
Occasionally, the Gas safety valve and the electric coils that control the gas valve are defective -- they can wear out when the dryer gets old. When this happens, the igniter glows, but gas never enters the heating chamber or does not stay consistant.
Performing a continuity test on either part will help you determine whether or not you need to replace it. But the coils should also be tested for amount of resistance as well as Ohms. As they may be showing ohms yet not putting out enough resistance to keep proper gas pressure flowing. Most coils should show at least 1300 ohms ( GIVE OR TAKE 150 OHMS). Anything significantly less Thus u get an ignition but then it soon goes back out. The flame does not stay lit.

Air Flow and Heat
The motor that drives the tumbler also drives a fan that circulates air through the heating chamber and the tumbler and expels it through the vent. If the air can't circulate, perhaps because of lint blockage, the heating chamber overheats, which prompts the cycling thermostat to turn off the gas. The thermostat resets when the chamber cools, but the chamber heats up quickly and the thermostat again shuts off the gas. The result is that the temperature in the tumbler doesn't stay hot, and your clothes take longer to dry, if they get dry at all.

Warning
There's a big difference between a dryer that doesn't heat up at all and one that just doesn't get hot enough to dry your clothes. In the first instance, the problem is usually a defective part, and things should be back to normal after you replace it. In the second instance, the problem is caused by restricted air flow, and you need to clear the lint filter and vents and take steps to prevent lint build-up. If you don't, you'll use more energy for drying than you need and the dryer may continue to malfunction. Worse, you may have a dryer fire.

Aug 21, 2014 | Kenmore Dryers

1 Answer

Kenmore Elite HE4 Gas Dryer Shuts off prematurely in the Auto Dry cycle and the Timed dry cycle


Gas Dryer no heat: or shuts down soon after heating CHECK:

Thermal Fuse
If the air flow in the dryer is restricted, the temperature in the heating chamber can get hot enough to blow the thermal fuse. If the fuse blows, it cuts power to the coils that control the gas valve. The fuse is usually mounted to the exhaust duct just inside the back panel. You can check its continuity with an ohmmeter. If, after disconnecting the fuse, you get any reading other than 0 when you touch the leads of the meter to its terminals, it has blown. There's no way to restore it -- you'll have to install a replacement.

Igniter and Gas Valve Coils
TEST with a multi meter: The igniter is an electric conductor that works like the element in an electric heater, glowing hot enough to ignite gas when you turn on the dryer. This conductor can burn out, and when it does, it may glow, but it won't get hot enough to ignite the gas. At times it may give a reading of continuity yet fail mechanically and not get hot enough to ignite flame though it gets hot and glows and even may show Ohms or continuity ( close circuit) ?
Occasionally, the Gas safety valve and the electric coils that control the gas valve are defective -- they can wear out when the dryer gets old. When this happens, the igniter glows, but gas never enters the heating chamber or does not stay consistant.
Performing a continuity test on either part will help you determine whether or not you need to replace it. But the coils should also be tested for amount of resistance as well as Ohms. As they may be showing ohms yet not putting out enough resistance to keep proper gas pressure flowing. Most coils should show at least 1300 ohms ( GIVE OR TAKE 150 OHMS). Anything significantly less Thus u get an ignition but then it soon goes back out. The flame does not stay lit.

Air Flow and Heat
The motor that drives the tumbler also drives a fan that circulates air through the heating chamber and the tumbler and expels it through the vent. If the air can't circulate, perhaps because of lint blockage, the heating chamber overheats, which prompts the cycling thermostat to turn off the gas. The thermostat resets when the chamber cools, but the chamber heats up quickly and the thermostat again shuts off the gas. The result is that the temperature in the tumbler doesn't stay hot, and your clothes take longer to dry, if they get dry at all.

Warning
There's a big difference between a dryer that doesn't heat up at all and one that just doesn't get hot enough to dry your clothes. In the first instance, the problem is usually a defective part, and things should be back to normal after you replace it. In the second instance, the problem is caused by restricted air flow, and you need to clear the lint filter and vents and take steps to prevent lint build-up. If you don't, you'll use more energy for drying than you need and the dryer may continue to malfunction. Worse, you may have a dryer fire.

Jul 19, 2014 | Kenmore Dryers

1 Answer

There is no heat on any of the cycles.


Check Igniter, Igniter Sensor (Senses Igniter is glowing) & gas valve Coils. Remove Front or rear access panel to observe/access these items. Set heated dry cycle & start dryer while observing Igniter, should start to glow bright orange for several seconds, sensor should send millivolt power to valve coils that will CLICK opening valve producing blue flame for heat. If Igniter doesn't glow within a minute, its bad, If it glows & nothing else happens it's either Sensor or Coils are bad, check the coils by using Ohm meter across plug ends of coils, if bad you will get no reading on meter, coil is open & no good, or take both Sensor & Coils to repair shop and have them tested. All 3 are accessable thru access panel opening.

Feb 14, 2011 | Dryers

1 Answer

Gas dryer not heating up


it probably has a igniter, not a pilot light that lil hole is a check sight hole, close the door and set the drier to start , within a few seconds you should see a glow plug light up, if not,, check the main fuse in the back of the machine,, this is normally caused by a lack of flow for the drier vent and over heating

Aug 02, 2010 | Kenmore 63942 Dryer

2 Answers

Amana NDG2335AW Gas Dryer runs but doesn't heat


Check the spark ignitor when firtst starting the dryer up. It should click within the first 15 seconds to light the pilot up

May 31, 2010 | Amana NDG2335AW Gas Dryer

1 Answer

Dryer starts with heat. After 10-15 minutes, when dryer calls for more heat, here a metal clicking noise, flame does not ignite. When it's clicking, I can look down the back from the top and see a glow....


Your gas valve coils are defective. Part #694539 and 694540 are required. Once the coils get hot they collapse internally and the gas valve shuts off. This is a common problem when valve coils get weak from use.

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1 Answer

How do you light pilot light?


Dryer does not have pilot light.  There is an ignitor that glows when the dryer is started and lights the flame when the gas begins to flow.  With the front of the dryer off start it up and look for the glow. when it glows hot enough (or on a newer model it might be a spark) the gas should ignite.  When the flame sensor sees that the gas is ignited it shuts off the ignitor and keeps the gas valve open until the temperature sensor gets high and shuts it off.  When the temp sensor cools down the cycle repeats.
If no glow or spark-->bad ignitor If no gas flow-->bad flame sensor or bad gas valve coil If gas comes on and goes off quickly-->lint filter and/or vent pipe or outlet may be clogged or bad flame sensor.

May 29, 2009 | Whirlpool Dryers

2 Answers

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your dryer has a safety feature that it will not run or heat when the door is opened. It is so no gas fumes are exhauseted into your home. Once the safety is engaged, It will not allow the dryer to restart for a short while. It should clear itself after only a few minutes. Hope this helps, good luck.

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hI YES THE COILS IS WHAT YOU HAVE TO CHANGE thANKS FOR THE QUESTION tHE APPLIANCS DOC

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