Applicable Systems
Greenstar GB162
Symptoms
The boiler reports a CH temperature sensor fault. The central heating flow sensor is reading incorrectly.
Possible Causes
- Sensor element drifted from calibration
- Sensor wiring damaged or connector corroded
- Sensor open or shorted
Troubleshooting Steps
- Step 1: Test the sensor at the current temperature
Resistance matches the chart - Step 2: Inspect the wiring and connector
Wiring is intact and connector is clean - Step 3: Replace the faulty sensor
New sensor reads correctly
How to Reset
To reset: Replace the faulty sensor, then clear the fault.
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Source: Worcester Bosch Boiler Manual, Worcester Bosch Group
Category: Home Boiler
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