Ideal · Logic MAX Combi²
DHW Thermistor Fault boiler fault code
Logic MAX Combi² — models C24 / C30 / C35
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What DHW Thermistor Fault means
DHW thermistor fault.
Gas Safe engineer: If the message remains, contact the installer or arrange a Gas Safe registered engineer.
If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
Safe check
Restart once using the normal external switch or the Restart button. If the message remains or returns, contact your installer or a Gas Safe registered engineer.
When to contact an engineer
If the message remains, contact the installer or arrange a Gas Safe registered engineer.
Source and provenance
- Logic MAX Combi2 User Guide · UIN 237660 A01 (10/2023) · §1.9 Fault Messages, printed pp. 10–11
user guide
10/2023 · UIN 237660 A01