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BoilerCodes
F.61
Vaillant fault code

Vaillant F.61: A fault in the gas valve control

Engineer only

The boiler has detected a fault in how its gas valve is controlled. Vaillant lists a wiring fault to the gas valve, a faulty gas valve, or faulty control electronics.

What you can safely do

There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.

Call a Gas Safe engineer if

  • Book a Gas Safe registered engineer.
Find a Gas Safe engineer near you Opens the official Gas Safe Register search.

Applies to: ecoTEC plus. Codes can differ between models, so check your manual.

What F.61 means on each Vaillant model

From Vaillant's own fault tables. Your model name is usually on the front of the boiler or in the user manual.

ModelMeaningCauses listed for engineers
ecoTEC plusGas valve regulation faultShort circuit or short to earth in the gas valve cable harness, gas valve defective, electronics defective

Common questions about Vaillant F.61

Is F.61 a main board fault?

It can be. Vaillant lists the gas valve wiring, the gas valve itself and the control electronics as possible causes, so an engineer needs to test which.

Nearby Vaillant codes

F.83F.23F.72F.20F.25F.27F.62conF.00F.01F.10F.11

See all 36 Vaillant codes

Sources