Viessmann Fault Code Checker

Important Disclaimer

The information contained within the Viessmann "Fault Code Checker" is intended for use by licensed contractors only.

Use of this program by unqualified personnel may result in property damage, personal injury or death.

The applicable Viessmann Manual must be consulted in conjunction with this program before any adjustments or repairs are made.

By hitting "Yes" below you confirm that you have read, understood and agree to this warning, that you are licensed and hold the current, appropriate licences to work on said equipment in the location and/or jurisdiction of installation.


The Fault Code Checker is intended for use by licensed contractors only.

End users are asked to contact a qualified contractor for all installation and service work. If you need assistance finding a contractor in your area, contact your Viessmann Sales Representative, or use our Contractor Locator.

We also have lots of information and product manuals available on our websites, which can be accessed by anyone.

Please pick one of the sites below to continue:

> Viessmann Canada

> Viessmann USA

Enter a fault code:


The fault code you entered was not found. Please check the spelling and try again.

Most Viessmann fault codes are 2 or 3-digit codes, e.g. "A9", "FEC", "dE", "F2", "38", "0F".


This fault code applies to several products. Please select one:

Applies to

System behavior

Cause of problem

Corrective measures

There are model-specific manuals for this product. Please select one: