319 494 Emergency

Ideal 319 494 Fault Code

Also written as 319494 — same fault.

The Ideal 319 494 fault code means: your boiler's viewing window is likely damaged or leaking, which means you cannot safely monitor the pilot light or burner flame.. It appears on 1 Ideal model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Sightglass assembly
Typical repair cost £90-160 (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 →

Ideal models that show the 319 494 fault code

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

Source

Ideal 319 494 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 27 April 2026