5P1
FAULT CODE
Ariston
First Ignition Failed (Warning)
Low Severity
DIY Check Possible
The first ignition attempt failed — the boiler will try again. This is a warning (non-lockout) code.
Step-by-Step Fix Guide
-
Step 1
The boiler will retry automatically
-
Step 2
If ignition still fails, it will escalate to code 501
-
Step 3
Check gas supply if the boiler continues to fail ignition
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.