BoilerFaultCodesYour boiler has detected a fault with the hot water temperature sensor, meaning it cannot accurately tell how hot the water is.
This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.
Technical description: Short circuit DHW sensor: check wiring and sensor.
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensor responsible for monitoring your hot water temperature. The most common reason is that the sensor's internal electrical circuit has failed or the connecting wires have become damaged or loose. Because the boiler can no longer safely tell how hot the water is, it stops heating to prevent overheating.
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 E30 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Quinta 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.