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What does fault code 40 on my Viessmann Boiler mean?
If your Viessmann Boiler displays fault code 40, it indicates a short circuit in the flow temperature sensor of heating circuit 2 (with mixer). You should check the flow temperature sensor.
What to do if the gas pressure switch reports no gas pressure in my Viessmann VITOCROSSAL 300 Boiler?
If the gas pressure switch in your Viessmann Boiler reports no gas pressure, the gas shut-off valve may be closed or the gas pressure switch may be faulty. Open the gas shut-off valve and check the gas flow pressure. If necessary, clean the gas filter.
Why does the air pressure switch switch off during operation in my Viessmann Boiler?
If the air pressure switch switches off during operation in your Viessmann Boiler, it might be due to flue gas back pressure or backed-up condensate. Remove the flue gas back pressure, check for backed-up condensate, and reset the burner control unit.
How to reset the on hold program on a Viessmann Boiler?
If your Viessmann Boiler is in the on hold program, it could be due to a lack of gas at the VPS gas pressure switch or because the safety chain is not closed. Reset it by holding down the reset button until '9' flashes.
Viessmann VITOCROSSAL 300 fan not running: what could be the cause?
If the fan in your Viessmann Boiler is not running, it could be that the fan is faulty, or the cables are faulty or broken. Check the cables and replace the fan if required.
What does fault code 94 mean on a Viessmann VITOCROSSAL 300 Boiler?
If your Viessmann Boiler displays fault code 94, it indicates a short circuit in the cylinder temperature sensor. You should check temperature sensor % on the solar control module or Vitosolic sensor.
What does fault code 91 mean on a Viessmann Boiler?
If your Viessmann Boiler displays fault code 91, it indicates a short circuit in temperature sensor aÖ. You should check sensor aÖ on the solar control module.
What does fault code 93 mean on a Viessmann VITOCROSSAL 300?
If your Viessmann Boiler displays fault code 93, it indicates a short circuit in the cylinder temperature sensor. You should check the temperature sensor at connection S3 to Vitosolic 100.
How do I fix fault code 58 on my Viessmann Boiler?
If your Viessmann Boiler displays fault code 58, it means there is a lead break in the cylinder temperature sensor. You should check the sensors.
Why is my Viessmann Boiler showing fault code 38?
If your Viessmann Boiler displays fault code 38, it indicates a lead break in the boiler water temperature sensor. You should check the boiler water temperature sensor.
General| Model | VITOCROSSAL 300 |
|---|---|
| Category | Boiler |
| Boiler type | Condensing Boiler |
| Heat Exchanger Material | Stainless Steel |
| Warranty | 2 years |
| Efficiency | Up to 98% |
| Control | Vitotronic control system |
| Fuel Type | Natural Gas |
| Standard efficiency | 98% |
