BoilerFaultCodesYour boiler has detected a temporary technical issue that frequently relates to an internal communication error or a sensor detecting an unusual reading.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Temporary fault code (Refer to section 7.10)
What causes this fault?
This fault occurs when the boiler's internal computer experiences a momentary communication glitch or receives an inconsistent reading from one of the temperature sensors. It acts like a temporary digital 'hiccup' where the main control board becomes briefly confused by the data it is receiving. If the issue persists, it usually points to a failing electronic control board or a sensor that is starting to wear out.
DIY fix possible
Locate the mode selector switch on the front panel.Turn the switch to the 'OFF/RESET' position and wait for 10 seconds.Turn the switch back to either 'Hot Water Only' or 'Heating and Hot Water' to see if the code clears.
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 70 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Vokera Linea HE 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.