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Error code reference

Bosch Dryer Error Code E:20A1

Main heating circuit

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What the E:20A1 error code actually means

Your Bosch dryer has detected dangerously high temperatures inside its heating system and has shut itself off to prevent damage or fire. This usually happens because lint or debris is blocking airflow somewhere in the dryer. Cleaning the lint filter, exhaust vent, or internal heat exchanger is the first step to resolving this issue.

Diagnostic procedure

The full E:20A1 procedure

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1
First diagnostic step
Clean lint filter, airways or heat exchanger.
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Most common causes of E:20A1

Ranked by how often they cause this code
  1. 1Clogged lint filter
  2. 2Blocked or dirty heat exchanger
  3. 3Restricted or kinked exhaust ducting
  4. 4Faulty thermistor or temperature sensor
  5. 5Failed thermal cutout or heating element

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Questions people ask about E:20A1

What does E:20A1 mean on a Bosch dryer?
E:20A1 indicates a stage 2 overheating fault in the main heating circuit. It is the 4-digit equivalent of error E:02 on Bosch dryers. The dryer shuts down automatically when this fault is detected to prevent component damage or a fire hazard. Restricted airflow from a clogged lint filter, heat exchanger, or exhaust duct is the most common trigger.
Is it safe to keep using my Bosch dryer when E:20A1 appears?
No, you should not continue using the dryer until the fault is resolved. E:20A1 is a stage 2 overheating error, meaning temperatures in the heating circuit have reached a critical level. Running the dryer in this condition risks damaging internal components and poses a potential fire hazard.
How much does it cost to repair a Bosch dryer showing E:20A1?
If the fix is simply cleaning the lint filter, heat exchanger, or exhaust ducting, there may be no parts cost at all, just time and effort. If a component like a thermistor or thermal cutout needs replacement, parts and labor costs typically range from $100 to $300 or more depending on the specific part and your location. A heating element replacement can push costs toward the higher end of that range.
How do I fix error E:20A1 on my Bosch dryer?
Start by thoroughly cleaning the lint filter, the heat exchanger, and any exhaust airways. On condenser and heat pump models, the heat exchanger is accessed separately and should be rinsed clean. If airflow components are clear and the error returns, a technician should test the thermistor, thermal cutout, and heating element for correct operation.
Will resetting my Bosch dryer clear the E:20A1 error?
A reset may clear the displayed code temporarily, but the error will return if the underlying cause has not been addressed. Because this is a stage 2 overheating fault, simply resetting the unit without correcting the airflow restriction or faulty component is not a lasting solution. Always identify and fix the root cause before restarting the dryer.

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