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DRYER HEATS UP THEN FLAME SHUTS OFF.EXHAUST IS CLEAR.THERMAL FUSE?THERMASTAT? HIGH HEAT?

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It could be a bad flame sensor or a bad thermostat.

Posted on Apr 13, 2009

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Maytag dryer is less than 3 years old. Blew thermal fuse. Cleaned all of the venting inside and out. dryer still overheating and blowing the thermal fuse. Replaced the thermal fuse and the high temp sensor...


Have you tried replacing the operating thermastat it's what shuts it off at the right temp and would cause the thermal fuse to go if it is not shuting.off at the right temp. It happens.
Hope this helps.

Dec 05, 2010 | Maytag PYE2300AY Electric Dryer

Tip

Whirlpool Dryer Various Test Procedures - Part 2


TEST #4 Heater
This test is performed when either of the following situations occur: Dryer does not heat Heat will not shut off
This test checks the components making up the heating circuit. The following items are part of this system:
Harness/connection, Heater relay, Thermal cut-off, Thermal fuse, High limit thermostat, Gas burner assembly,
Centrifugal switch, Exhaust thermistor, Machine control electronics, Gas supply. Dryer does not heat:
1. Unplug dryer or disconnect power.
2. Remove the back panel to access the thermal components.
3. Perform TEST #4b. If the thermal fuse is OK, go to step 4.
4. Perform TEST #4c. If the thermal cut-off is OK, go to step 5.
5. Locate the high limit thermostat. Measure the continuity through it by connecting the meter probes on the
red wire and blue wire terminals. If there is an open circuit, replace the high limit thermostat and thermal cutoff.
Otherwise, go to step 6.
6. Perform TEST #4d. If this is OK, replace the machine control electronics.
Heat will not shut off:
1. Unplug dryer or disconnect power.
2. Access the machine control electronics, remove the P14 connector, then measure the resistance between P14-3 (red-white wire) and P14-6 (red-white wire) at the connector. If 5–15 k ohms are measured, replace the machine control electronics. If the resistance is greater than 20 k ohms, replace the exhaust thermistor.
TEST #4a Exhaust Thermistor
The machine control electronics monitors the exhaust temperature using the exhaust thermistor, and cycles the heater relay on and off to maintain the desired temperature. Begin with an empty dryer and a clean lint screen.
1. Plug in dryer or reconnect power.
2. Start the Timed Dry cycle.
3. If after 60 seconds, F-22 or F-23 flashes in the display and the dryer shuts off, the thermistor or wire harness is either open or shorted. Unplug dryer or disconnect power. Check wire connections at the machine control electronics and thermistor. If wire connections are OK, check exhaust thermistor resistance per step 5.
4. If F-22 or F-23 does not flash in the display, the connections to the thermistor are good. Therefore, check the exhaust temperature value at any or all of the temperature levels in question, using the Timed Dry cycle, and the following process: Hold a glass bulb thermometer capable of reading from 90° to 180°F (32° to 82°C)
in the center of the exhaust outlet. The correct exhaust temperatures are as follows:
TEMP
SETTING HEAT TURNS
OFF* HEAT TURNS
ON High 155° ± 5°F
(68°± 3°C) 10–15°F
(6–8°C)
below the
heat turn off
temperature Medium 140° ± 5°F
(60°± 3°C) 10–15°F
(6–8°C)
below the
heat turn off
temperature Low 125° ± 5°F
(52°± 3°C) 10–15°F
(6–8°C)
below the
heat turn off
temperature Extra Low 105° ± 5°F
(41°± 3°C) 10–15°F
(6–8°C)
below the
heat turn off
temperature The measured overshoot using the glass
bulb thermometer in the exhaust outlet can
be 30°F (17°C) higher.
5. If the exhaust temperature is not within specified limits, or you have come here from step 3, remove the P14 connector, then measure the resistance between P14-3 (red-white wire) and P14-6 (redwhite wire) at the connector. If the resistance is OK, check P14-3 and P14-6 to machine ground. If resistance is greater than 0 (zero), replace wiring harness. NOTE: All thermistor resistance measurements must be made while dryer is
disconnected from power. The following table gives temperatures and ranges for the associated thermistor resistance values.
Temp
F C
Res
kΩ
Temp
F C
Res
kΩ
50° (10°) 19.0 -22.0 80° (27°) 8.5-10.5 60° (16°) 14.8-16.8 90° (32°) 6.8-8.8 70° (21°) 11.5-13.5 100° (38°) 5.0-7.0 If the thermistor resistance does not agree with table, replace the exhaust thermistor. If the thermistor resistance checks agree with the measurements in the table, replace the machine control electronics.
TEST #4b Thermal Fuse
The thermal fuse is wired in series with the dryer drive motor.
1. Unplug dryer or disconnect power.
2. Access the thermal fuse by first removing the back panel.
3. Using an ohmmeter, check the continuity across the thermal fuse. If the ohmmeter indicates an open circuit,
replace the failed thermal fuse.
TEST #4c Thermal Cut-Off
If the dryer does not produce heat, check the status of the thermal cut-off.
1. Unplug dryer or disconnect power.
2. Access the thermal cut-off by first removing the back panel. .
3. Using an ohmmeter, check the continuity across the thermal cut-off. If the ohmmeter indicates an open circuit,
replace the failed thermal cut-off and high limit thermostat. In addition, check for blocked or improper exhaust
system.

TEST #4d Gas Valve
1. Unplug dryer or disconnect power.
2. Access the gas valve by removing the front panel and drum assembly.
3. Use an ohmmeter to determine if a gas valve coil has failed. Remove harness plugs. Measure resistance across terminals.

on Apr 11, 2009 | Whirlpool LER4634J Electric Dryer

1 Answer

Dryer Model LGR 8620PW0. Dryer initially heats up for three minutes, then heat shuts down. Glow coil comes back on, but no gas ignition. Glow coil continues to do this. Thermal fuse is good. Limits are...


try clearing out the exhaust duct that runs from the back of the dryer to the outside of the house. If this is clogged then this will limit air flow therefore by extinguishing you fire. An easy test to figure this out would be to remove the hose from the back of the dryer and see if you get the same results. If you get the same results try checking all the traps for lint and debris.

Jun 15, 2010 | Dryers

2 Answers

HOW CAN A DRYER IGNITE A FLAME AT FIRST FOR TEN MINS THEN WHEN THE DRYER WANTS TO HEAT UP AGAIN I SEE A GLOW BUT NO FLAME COMES THE SECOND TIME SHOULD I REPLACE THE THERMAL FUSE


No you should replace the coils. 3a3915a.jpgWhy? You know you are getting power to the gas assembly so that means the fuse and control are functioning. The igniter glows so that is good. The Flame detect is fine because it shuts down the glowbar when it heats up. So those pesky coils get hot and quit. They eventually cool back down and work a little more, very aggervating to diagnose but easy to fix.2b3709e.jpgNote you do not have to remove the gas assembly to replace these coils.

Apr 23, 2010 | Whirlpool Dryers

1 Answer

Hi i have a whirlpool gas dryer LGR8648LWO and


If your ignitor (glow bar) is glowing that indicates the thermal fuse is okay.

With the symptoms you are describing it is acting more like an air flow issue than a component failure. Make sure your door seal is good, your venting is connected properly and try it again. I would not install the thermal fuse.

Apr 23, 2010 | Whirlpool Dryers

2 Answers

Neptune dryer proble. The dryer works except no heat. Flame starts, but then turns off. Igniter element was checked and is good. What else should I check in order of probability? - flame sensor? -...


Hi


Thanks for using FixYa. Things that could stop an 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.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Jan 23, 2010 | Maytag Neptune MDE5500AY Electric Dryer

1 Answer

KENMORE DRYER MOD 110.72932100 DOESN'T HEAT ENOUGH. THE FLAME TURNS ON FOR LESS THAN A MINUTE AND THAN REMAINS OFF FOR A COUPLE MINUTES AND DOESN'T HEAT. I CHANGED THE COIL'S AND THE THERMAL FUSE I CHECKED...


Reduced airflow due to a clogged screen or obstructed vent will cause the burner to short cycle if it heats up with the vent disconnected you know there is a problem with the exhaust.

Nov 01, 2009 | Kenmore 400 6943 Dryer

1 Answer

Gas Dryer repair


Sounds Like the thermal heat sening bulb is not seeing the flame try adjusting the flame so that it hits the thermal bulb with the tip of the flame about 1/4 inch away. If this does not help you may have to replace the thermal bulb.

Sep 30, 2009 | Dryers

1 Answer

Maytag dryer only heats for short time


If the dryer has a flame for 2 cycles and then nothing it sounds like your gas coils are failing. Replace them and that should solve your problem

Dec 30, 2008 | Dryers

1 Answer

Whirlpool gas dryer


From the sound of your problem, it appears you may have a faulty overtemp switch that gets too hot , opens the circuit to disable gas and flame, then cools down and allows it to start again.. Since you didn't provide a specific model number with your question.. use this link to find replacement whirlpool thermal fuses etc.. http://www.pcappliancerepair.com/whirlpool-dryer.php#fuse

Hope this helps..

Sep 06, 2008 | Whirlpool Dryers

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