A boiler may not respond to a thermostat if the thermostat runs out of battery or is placed too far away. If your specific Vaillant boiler model is listed below, then the Water Pressure Sensor (0020059717) should be the correct replacement part number.

Tip: If the F75 was caused by dirt on the sensor, it’s usually best to get it replaced rather than cleaned due to the costs probably working out the same. Is my boiler’s pump defective or is it the pressure sensor? Fault code F.73 indicates an interruption or short circuit of the water pressure sensor, or an interruption or short circuit to the ground in the supply line to the water pressure sensor. It can also indicate a defective water pressure sensor. How to fix Vaillant Boiler fault code F.73If the specific boiler model is known, there shouldn’t be too much confusion on which is the correct Pump required. If you are getting an F75 error code, it is almost certain you have an older model of Vaillant boiler. These older models were fitted with a Wilo pump, as we mentioned above, and these are known for being unreliable and easy to break. Other possible pump issues include split or deteriorating seals and possible limescale build-up too (particularly in hard water areas).

Glowcare are Vaillant Approved Specialists, covering the Greater Manchester, Cheshire, Liverpool and Lancashire areas. Fault code F.02 indicates an interruption in the DHW (Domestic Hot Water) outlet sensor. This can be caused by a defective NTC, defective NTC cable, faulty plug connection on the NTC, or a defective plug connection on the actoSTOR electronics. This fault code is applicable only when it occurs in conjunction with fault code F.91. How to fix Vaillant Boiler fault code F.02 components. When this happens on the pressure sensor, it can mean that the sensor signaling is no longer sensing a change in the pump pressure. One of the most common problems that can occur with all boilers, and Vaillant models are no different, is with the central heating pump.

What Is The Vaillant F75 Fault Code?

The gas valve is an essential component in your heating system as it controls the heating of water for your radiators or hot water taps. When your boiler switches on and needs a flame to heat up the water, the gas valve opens up to let enough gas through for the ignition. However, a faulty gas valve is a serious malfunction as it can allow gas through even when it is not needed so never ignore the F62 error code on your boiler’s display. To resolve this issue, inspect and clean the ignition electrode. If the corrosion is severe or cleaning doesn't fix the problem, it may be necessary to replace the ignition electrode. Vaillant Boiler Fault Code F.61 - Fuel valve actuation What does Vaillant Boiler fault code F.61 mean? There are a long list of Vaillant error codes and below we explain some of the most common to help you understand what they mean and how they can be fixed.

Boiler ignition failure will leave you without heating or hot water if it is not resolved so this is not an issue to ignore. Your ignition is essential, and it keeps the flame burning, which in turn heats up water as it passes through the pipe. A faulty or failed ignition is a relatively common issue with Vaillant boilers and will be displayed as an F28 fault code which you need to look into. If, however, the Vaillant F.75 fault is due to Pump failure, then it is really important to identify the correct Vaillant boiler model. For most boilers, including those manufactured by Vaillant, the reset procedure is rather simple. All you need to do is press the reset button — which is typically located close to the boiler’s display — and hold it for 3-5 seconds. Doing so should clear any error codes on the boiler’s display. Water pressure sensor and/or pump defective, air in heating installation, too low pressure in boiler; connect external expansion vessel to return.Not what you're looking for? Try our unique Spares Finder tool or you can view all Vaillant Boiler Spares products. F75 is a very common fault code on Vaillant ecoTEC boilers and appears when the boiler is unable to detect sufficient pressure as the pump is in operation. Fixing the F75 fault