Applicable Systems
Greenstar GB162
Symptoms
The boiler reports an automatic air vent fault. The automatic air vent is not functioning correctly.
Possible Causes
- Vent valve seat contaminated or stuck
- Vent cap closed or blocked
- Float mechanism jammed
Troubleshooting Steps
- Step 1: Inspect the automatic air vent
Vent is clean and unobstructed - Step 2: Check the vent cap position
Cap is open for automatic venting - Step 3: Test the float mechanism
Float moves freely and seals correctly
How to Reset
To reset: Repair or replace the automatic air vent, then clear the alarm.
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Source: Worcester Bosch Boiler Manual, Worcester Bosch Group
Category: Home Boiler
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