Boiler Cuts Out in Cold Weather Only
The boiler is fine most of the year, then fails during the first hard frost..
The boiler is fine most of the year, then fails during the first hard frost.
What is actually going on
The boiler is fine most of the year, then fails during the first hard frost.
The realistic causes, in order
A frozen condensate pipe, which is far and away the most common seasonal cause A marginal gas supply that only shows up when every appliance is running flat out An external component or sensor affected by low temperature in an unheated garage or loft installation
What we test on site
Condensate route and diameter, and whether an internal termination is possible Gas working pressure with the boiler at maximum rate and other appliances running Installation environment and frost protection provision
Worth checking today if you have a boiler that cuts out in cold weather
- Thaw the external condensate pipe with warm water and see whether service returns
- Note the outside temperature when it happens
- A boiler sited in an unheated space needs frost protection to remain functional and to avoid freeze damage to the system.
Who does the work
- Gas Safe registered engineers — registration 554328
- Worcester Bosch accredited installer
- John The Plumb Ltd, company registration 10026483
Get a boiler that cuts out in cold weather diagnosed properly
Condensate re-routing and, where needed, gas supply correction stop the seasonal repeat.
Questions we get asked
What causes a boiler that cuts out in cold weather on a gas boiler?
A frozen condensate pipe, which is far and away the most common seasonal cause
What normally puts a boiler that cuts out in cold weather right?
Condensate re-routing and, where needed, gas supply correction stop the seasonal repeat.
Is it safe to keep using the system with a boiler that cuts out in cold weather?
A boiler sited in an unheated space needs frost protection to remain functional and to avoid freeze damage to the system.