E53
FAULT CODE
Potterton
Condensate Pipe Blocked
Medium Severity
DIY Check Possible
The condensate system is blocked, preventing the boiler from operating safely.
Cold Weather Note
E53 in cold weather is almost always a frozen condensate pipe. Thaw before calling an engineer.
Step-by-Step Fix Guide
-
Step 1
Check the external condensate pipe for ice blockage
-
Step 2
Thaw with warm water
-
Step 3
Wait 15 minutes
-
Step 4
Reset the boiler
-
Step 5
If E53 continues, the internal condensate siphon may need cleaning — call a Gas Safe engineer
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.