Specific Winter Considerations for Lockout
In freezing conditions, several factors can make a boiler ignition lockout more likely or complicated. Condensate pipes freezing is a major one; if the condensate line is blocked with ice, the boiler might lockout as a secondary safety feature, even if the primary ignition system is fine. We see this more frequently in 1990s–2000s developer estates around Westhoughton, where external condensate runs might be less insulated. Even a perfectly functioning electrode can fail to ignite if the gas pressure is marginally low and the increased demand in colder weather stresses the system.
- External condensate pipes can freeze solid.
- Increased system demand affects gas pressure.
- Ice accumulation on flue terminals.
- Frozen gas meter regulator.

