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HomeRepair HelpBosch Dryer RepairBosch Dryer not heating Repair
Bosch Dryer not heating
If your Bosch dryer is running but not heating, the most likely culprit is a blown thermal fuse caused by a restricted vent; the fuse is on the blower housing or at the heat source and you should check the exhaust vent before replacing it. Next in line are motor-related issues: many drive motors have a centrifugal switch that lets the heat circuit close, so a bad switch can let the drum run but prevent heat. On gas models, failed gas valve solenoids or a burned-out igniter will stop the burner from lighting. Also double-check the control settings; an accidental no-heat cycle or wrong temperature selection is an easy fix. You can test the thermal fuse and igniter for continuity with a multimeter to confirm a failure. If you need parts, enter your dryer model number on RepairClinic.com to find the exact replacement heating element, thermal fuse, drive motor, igniter, or gas valve parts that fit your machine.
01 - Bosch Dryer Thermal Fuse
The thermal fuse is a safety device designed to protect the dryer from overheating. The fuse is located on the blower housing or at the dryer’s heat source such as the heating element on electric dryers or at the burner on gas models. The fuse should be closed for continuity meaning it has a continuous electrical path through it when good. If overheated the fuse will have no continuity meaning the electrical path is broken and the fuse has blown. A multimeter can be used to test it for continuity. Be aware that a blown thermal fuse is an indication of a restricted exhaust vent from the dryer to the outside. Always check t...
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02 - Bosch Dryer Drive Motor
Most dryer drive motors have a centrifugal switch that energizes a start winding when the motor is first started and closes a heat cycle contact to allow the heat source to work. If the motor's centrifugal switch is faulty, either the motor won’t run or the motor will run but the dryer won’t heat. Since most centrifugal switches are not sold separately, the entire motor will need to be replaced if the switch is defective.
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03 - Bosch Dryer Gas Valve Solenoid
Gas dryers have two or more gas valve solenoid coils. The gas valve solenoids open the gas valve ports to allow gas to flow into the burner assembly. If a gas valve solenoid fails, the dryer won’t heat. To determine if one or more of the gas valve solenoids has failed, check the igniter. If the igniter glows and goes out but does not ignite the gas, the gas valve solenoid is defective. If one or more of the gas valve coils are defective, we recommend that you replace them as a set.
Highly Likely
04 - Incorrect cycle settings
Ensure the dryer is set to the appropriate heat setting. The setting may have been inadvertently changed to a non-heat option.
Highly Likely
05 - Incorrect cycle selected
The dryer setting may have been inadvertently changed to a non-heat option. Confirm the dryer is set to a proper heating option such as "Regular" or "Heavy" to see if that improves drying performance.
Highly Likely
06 - Bosch Dryer Igniter
The igniter uses heat to ignite the gas in the burner assembly. If the igniter is not working, the gas will not ignite, preventing the dryer from heating. To determine if the igniter has burned out, use a multimeter to test the igniter for continuity. If the igniter does not have continuity, replace it.
Highly Likely
Frequently Asked Questions
Why is my Bosch dryer not heating?
My dryer is overheating and the thermal fuse keeps blowing, what should I check?
My gas dryer starts but won’t heat, is it the igniter or the gas valve solenoid?
Dryer not starting or not turning on, could the drive motor be the problem?
How do I enter my model number or part number on RepairClinic to get the correct replacement part?
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