How much does it cost to fix Ideal error code 80?

Typical repair cost for the Ideal 80 fault is £120-200 including labour.

80 Low

Ideal 80 Fault Code

Q: What does the Ideal 80 fault code mean?

Your boiler is struggling because it has lost the signal from the temperature sensor located outside your home, so it is defaulting to a standard operation mode.

The Ideal 80 fault code means: your boiler is struggling because it has lost the signal from the temperature sensor located outside your home, so it is defaulting to a standard operation mode.. It appears on 2 Ideal models in our database.

Technical description: ALTERNATING 'F' AND '6' - OUTSIDE SENSOR FAULT

Typical repair cost £120-200 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 80: no call-out fees, no surprise bills.

Approved partner

Domestic Appliance Guard

Unlimited call-outs, 24/7 helpline, no price-hike promise

Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Ideal models that show the 80 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal 80 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026