Home Appliance Timber Dryer does not Heat, how to fix? part 3

Check Cycling Thermostats

Next, check the dryer cycling thermostats as the possible cause for no heat in the dryer. The types of thermostats most commonly used in dryers (gas or electric), are the bimetal fixedand adjustable thermostats. Their primary function is to break the circuit to the gas main burner or the heating element when a certain temperature has been attained in the dryer drum. You can easily check these thermostats by removing one lead from the suspected thermostat. Set the volt/ohmmeter on the RX-1 scale. Place one probe of the volt/- ohmmeter on each terminal of the thermostat. You should see a continuity reading on the volt/- ohmmeter scale of approximately 0 ohms, or full- meter deflection. If the thermostat does not show continuity, replace the defective thermostat to restore the dryer to proper operating order.

You can also bypass the thermostat by tying the terminal leads together to see if the dryer begins to heat. If the element heats, this would indicate a faulty thermostat. NOTE: Under no circumstance should you operate the dryer for more than a few minutes when you bypass a thermostat.

Use the same procedures to check the cycling thermostats of a gas dryer.

Check High-Limit Thermostat

Next, check the dryer high temperature, or high-limit thermostat, as the possible cause for no heat in the dryer. All dryers, whether electric or gas, use a high-limit thermostat in the heater box. This thermostat is a safety device used to break the circuit (by shutting OFF the heat source) if the dryer thermostat fails, or if other electrical or mechanical failures causes extreme high temperatures in the dryer.

To check the dryer high-limit thermostat, unplug the dryer power cord from the 220-to 240-volt receptacle. Set the volt/ohmmeter on the RX-1 scale. Place one probe of the volt/ohmmeter on each terminal of the thermostat. A continuity reading of 0 ohms, (full-meter deflection), means the thermostat is OK. No continuity means the thermostat is defective, or open.

When making the above check, for gas dryers, use the same procedure.

Repair Procedures

Unplug the dryer power cord or gas supply before servicing the clothes dryer. Exercise care when moving the dryer from its original position, or the dryer legs could easily tear or scratch the floor.

To Replace Dryer Cord

To replace the electric dryer cord, remove the access plate to the dryer terminal block. Remove the screws that secure the dryer cord to the terminal block.Remove the defective power cord from the dryer and install the replacement part power cord.

When replacing the power cord on the gas dryer, follow the same procedure as outlined above for the electric dryer.

To Replace Dryer Timer Assembly

Unplug the dryer power cord and remove the dryer console back. Remove the timer knob by pulling it forward. Remove the screws that secure the timer assembly to the console and remove the timer assembly.

Next, remove the electrical wires that are attached to the terminals of the timer assembly.

They are to be reinstalled on the same terminals of the replacement part dryer timer assembly. Install the replacement timer by mounting in the same position as the failed part. Follow the instructions and procedures that are provided in the replacement timer assembly kit. If no installation steps are provided, reverse the above steps.

When replacing the timer assembly of a gas dryer, follow the procedures as outlined above for the electric dryer.

To Replace Selector Switch

Unplug the dryer power cord, and with the dryer console back panel removed, remove the screws that secure the switch to the console assembly. Remove the selector switch knoband remove the switch assembly from the dryer consol. When removing the electrical wires from the selector switch, note the sequence in which they were removed because you will have to reinstall them on the same terminals of the replacement switch..

Install the replacement selector switch by mounting in the same position as the failed part. Follow the instructions and procedures provided in the replacement part selector switch kit, or reverse the above steps.

Replacing the dryer selector switch on the gas dryer is basically the same procedure as outlined above for the electric dryer.

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