f75 vaillant what is this fault code?
You have no hot water, so you head to your Vaillant boiler and find fault code F75. What does this mean?.
F75 relates to a circulation issue, where your Vaillant boiler cannot detect the pumps flow of water or a difference in pressure relating to circulation of water.
What is the cause of this Fault?
When your Vaillant boiler has shown the fault code F75 a sensor inside has tripped the pcb due to either no change in it dcV or it maybe faulty. F75 can be caused by issues in the Vaillant and Glowworm range, one of which could be your pump, as other time it sludge will damage the pump causing it to become weaker. Blockages in the heat exchanger, and pipework restrictions are all cuases for F75 on the Vaillant and Glowworm boilers. Read more below
The underlying fault of the most common Vaillant issue?
SLUDGE!. Yes the main cause for this fault starting to appear is a sign your system has sludge, even if slight corrosion building up, is more than enough to start parts seizing or sticking. Sensor become blocked. Which can lead to expensive repairs. Powerflush can be booked direct, ( see more HERE ) with our team from just £250
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