Vaillant F28 Error Fix

You can receive the F28 error from the boiler that can be caused by different reasons. The error is usually about the gas system on the boiler. The gas valve faults or gas supply faults can be the reasons that you are receiving the error. Besides that, other causes may lead to having the F28 error at the same time.

Why Do You Get F28 Error?

The gas flow pressure can be too low.

There can be a fault in the gas valve and gas supply.

The gas restrictor or gas valve may be incorrect.

There can be air in the gas.

The problem can be about the ignition system.

The gas meter defective might not work well.

There can be a problem with the gas pressure regulator.

Boiler Printed Circuit Board (PCB) faults can be the reason that you get an F28 error if it is incorrectly plugged in.

The defective electronics are also the reasons.

How to Fix Vaillant F28 Error

You need to check the gas meter if it is working well.

You need to restart the boiler by pressing it 3 times and follow if there will be a change on the system.

You should be sure that there is no problem with the condensate pipe.

Cold weather can be a reason to not let the system work well and damage some parts of the system, you can check them.

If there is no change after you restart the boiler and check the system, you need to contact the service instantly and get professional help instead of buying a new boiler. When the problem is about the gas system, it can be solved only by getting help from a professional.