FD
FAULT CODE
Ideal
Condensate Blocked / Frozen
Medium Severity
DIY Check Possible
The condensate drain system is blocked or frozen. FD is Ideal's code for a blocked condensate issue.
Cold Weather Note
FD in winter almost always means a frozen condensate pipe. Thaw with warm water before calling an engineer.
Step-by-Step Fix Guide
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Step 1
In cold weather, locate the white plastic condensate pipe on the outside wall and thaw with warm water
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Step 2
Wait 10 minutes for the blockage to clear
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Step 3
Reset the boiler
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Step 4
If FD persists after thawing, call a Gas Safe engineer to inspect the condensate trap
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.