0A37 – Pro Tec 50 High
Your boiler has stopped working because water is not moving through the heating system quickly enough to prevent the unit from overheating.
Technical description: Insufficient system flow (if the system flow is too low for a certain length of time boiler will switch off)
Typical repair cost: £120-350 (including labour)
DIY fix possible
Check that all radiator valves and any external isolation valves are fully openEnsure your system pressure is at the correct level, usually between 1.0 and 1.5 barBleed all radiators to remove trapped air that might be blocking flow
Protect yourself from future repair bills
A boiler cover plan would cover faults like 0A37 – Pro Tec 50 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- System filter
- Flow temperature sensor
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