Your boiler is unable to read the temperature of the water coming out of your taps, which usually means your hot water will stop working or become unreliable.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Open circuit DHW temperature sensor
What causes this fault?
This fault occurs when the boiler's control board loses its connection to the sensor that measures hot water temperature. The most common reason is that the sensor itself has failed internally or the electrical wires connecting it have become loose or damaged. Without this data, the boiler cannot safely heat your water to the correct temperature and shuts down the hot water function as a precaution.
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 E32 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Selecta 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.