Applicable Systems
Vitodens
Symptoms
The ignition system has failed to ignite the burner. The appliance cannot produce heat.
Possible Causes
- Ignition electrode gap incorrect or fouled
- Ignition transformer or module failed
- Gas supply insufficient at the burner
Troubleshooting Steps
- Step 1: Check ignition electrode gap and clean if fouled
Electrode gap correct and clean - Step 2: Test ignition transformer output voltage
Transformer outputs rated voltage - Step 3: Verify gas supply pressure at the burner inlet
Gas pressure at correct level
How to Reset
To reset: Reset the ignition fault after correcting the ignition or gas supply issue.
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Source: Viessmann Vitodens Boiler Manual, Viessmann Werke GmbH
Category: Home Boiler
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