What does the Heatline d.85 fault code mean?

Your boiler is currently operating at its lowest possible power setting to maintain your heating, which may result in radiators feeling lukewarm or the house taking longer than usual to warm up.

How much does it cost to fix Heatline error code d.85?

Typical repair cost for the Heatline d.85 fault is £90-180 including labour.

Heatline d.85 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Minimum power setting for heating mode

Shared across the Monza range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

d.86View →d.87View →

All 111 fault codes on the Monza

Seeing a different code? Every code this model can display, in one place.

d.00 d.01 d.02 d.08 d.09 d.10 d.16 d.17 d.18 d.20 d.22 d.23 d.33 d.34 d.35 d.36 d.40 d.41 d.44 d.67 d.68 d.69 d.71 d.80 d.81 d.82 d.83 d.93 d.94 d.96 Err F00 F01 F10 F11 F20 F22 F23 F24 F26 F27 F28 F29 F32 F49 F61 F62 F63 F64 F65 F67 F68 F70 F71 F72 F73 F74 F76 F77 F83 F84 F85 F86 P.01 P.02 P.03 P.05 P.06 P.07 S.00 S.01 S.02 S.03 S.04 S.05 S.06 S.07 S.08 S.10 S.11 S.13 S.14 S.15 S.16 S.17 S.20 S.21 S.23 S.24 S.25 S.26 S.27 S.28 S.30 S.31 S.32 S.34 S.35 S.36 S.37 S.41 S.53 S.54 S.58 S.90 S.92 S.95 S.96 S.97 S.98

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Your boiler is currently operating at its lowest possible power setting to maintain your heating, which may result in radiators feeling lukewarm or the house taking longer than usual to warm up.

What the manual says

Engineer required

Avoid the next call-out bill

Related fault codes

All 111 fault codes on the Monza

Related guides you might find useful

Radiator not heating up

Boiler won't turn on: 9-step checklist

Pilot light keeps going out

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