BoilerFaultCodesWhat the manual says
Manufacturer manualREFLO TOO HIGH ERROR Temperatura misurata non corretta
What causes this fault?
This fault occurs when the boiler's internal temperature exceeds safe limits, triggering a shutdown to protect the unit from damage. The most common reasons are a lack of water flow due to a failing pump, a blockage in the heat exchanger, or a faulty sensor sending incorrect temperature readings to the control board.
This issue is more frequent during the first cold snap of winter when a pump that has been idle all summer suddenly seizes or struggles to circulate water through the system.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Avoid the next call-out bill
A cover plan would handle faults like E26: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.