BoilerFaultCodesYour boiler has stopped working because it cannot correctly measure the temperature of the water inside the system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Water temperature sensor fault (open or short circuit)
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that monitors water temperature. This is usually caused by the sensor failing due to age or internal wear, though it can also happen if the electrical wires connecting the sensor to the main control board have become loose or damaged.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E06 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Potterton Envoy 30 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.