Oven Temp Problem


Old 11-10-05, 05:23 PM
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Oven Temp Problem

I have a self cleaning Whirlpool oven (Model RB260PXY) that does not hold temp. The oven will heat up to the set temp. Ex 350, but it will not maintain it. Once it reaches the set temp it seems that the heating units will not come back on automatically. I can turn the oven off and then back on and it will start to heat up again. The lower heating element comes on when I first turn the oven on, but it doesn't appear to be coming on to maintain the temp. Items do not get done on the bottom.Any thoughts?
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Old 11-12-05, 06:35 AM
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Hello: FOREUS4

The cause is exactly the same as a gas oven.
Some of the possible causes are below.

Thermostat is loosing it's ability to control temperatures. Most can be calibrated. However, calibration is not a do it yourself project.

When an oven fails to maintain the desired set temperature, before any parts are replaced, I suggest you have the thermostat checked for calibration. If the thermostat needs a recalibration, this is NOT a do-it-yourself project.

Special tools, training, practice, procedure and experience are needed along with the proper technique and adjustments made in the correct sequence in order to successully accomplish the task.

Done incorrectly, as a do-it-yourself task, can ruin an otherwise good thermostat that only needed an adjustment...

I highly suggest you either contact the utility company and inquire if they perform this service. If they do not provide this service, contact the local appliance service dealer listed in the phone book.

If a thermostat fails to control oven temperature, burns food items you attempt to prepare, bakes much too quickly or the temperature soars upwards uncontrolled, chances are likely the thermostat will needed to be replaced.

Oven thermostats are a non repairable part. When determined to be defective, there isn't any other option except to replace the entire part.

Any oven thermostat that is more then 50 degrees out of temperature adjustment when the temperature is verified by a trained service person using either an electronic digital readout meter or liquid filled oven thermometer, the thermostat is considered to be defective.

Thermostats can be a do-it-yourself installation project. Care most be used during the installation process. Most importantly, handle the capillary extension tube sensor carefully. There cannot be any kinks or sharp bends in that thin copper/bronze/brass metal tubing.

Once the new thermostat is installed exactly as the prior one was, be sure to secure the sensor element, in the oven compartment, into the two holding/securing clips.

Temperature drops, differences and swinges in the range you mentioned indicates the thermostat is defective. The interanl bellows are wornout and or the temp senser in the ovens baking compartment is defective. Only real option is to replace it.

The first thing to be sure of before attempting any repairs is to insure that the door closes correctly and completely. Also check the door gaskets. Replace them if there is any doubt as to there condition.

Next is to insure there is nothing in the ovens baking inside area that would block and or restrict the natural flow of heat upwards and out the venting outlet. No aluminum foil is to be used ever.

If all the above is found to be in correct and or after replacing the door gaskets, call your gas supplier. Request a thermostat calibration be done to check and verify the condition exists.

If the condition does exist and the thermostat cannot be adjusted to correctly maintain the set temp, the thermostat is defective and must be replaced.

Oven thermostats cannot be calibrated without the usage of an electronic digital temperature sensing and display device. This electronic device is called a fluke. Named after the person whom invented it.

Any do it yourself attempts to adjust the temperature settings without this electronic device or a similar electronic digital readout device will do more harm than good. Trust me.

Read the manufacturers online web site for product information, problem solving methods, disassembly instructions, repair procedures, pictorials and schematics, may be available online.

An excellent source for orginal replacement parts is your local retail appliance parts store. Parts dealers are listed in the phone book under appliances. Bring the make, model and serial numbers if you stop in at the store.

Help Link:
Range-Stove-Oven-Broiler Basic Help Information & Manufacturers Web Site Links: http://forum.doityourself.com/showthread.php?t=159808

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