A boiler that continually switches off is a wearisome process – and it can leave you without any heating or hot water. Maybe it’s how you have it set up, or maybe your pressures are off.
These are the most common reasons your boiler could be blowing cold in UK homes – and a couple of safe checks you can perform prior to arranging repair:
1) Low boiler pressure
When the pressure drops too low, many combi boilers will turn off.
Pressure gauge is typically below 1 bar (Frequently around .5 or less)
Things you can do: topping up with the filling loop may be simple, but check your boiler manual. If the pressure continues to decrease, you may have a leak or bad pressure relief valve.
2) Thermostat or programmer issues
This could be one of the most common reasons a boiler is turning on and off – if your thermostat is set too low or isn’t working properly (perhaps due to flat batteries), then it’s not going to signal for enough heat from the boiler, so only having initial bursts are likely.
Replace batteries, check on schedule and set temperature higher – quick checks.
Frozen condensate pipe (especially in the winter) A common issue on these boilers.
Condensing boilers will shut down when it is very cold as the condensate pipe which takes moisture away from your boiler may freeze.
Symptoms: Noise of water running through, error code and boiler jamming during a cold snap.
One follow up point: If you think if that is happening, call an engineer or do as your manufacturer tells you – DO NOT TAKE ANYTHING APART. For Boiler Repair Cheltenham, contact https://www.hprservicesltd.com/cheltenham-boilers/boiler-repair-cheltenham/
3) Insufficient cooling that leads to overheating
Without adequate water circulation, the boiler might get too hot and shut down.
Common reasons include:
Air in radiators
A stuck pump
Sludge build-up in the system
A blocked filter
You will find that some radiators are heating unevenly or have cold spots.
4) Faulty components
There are a couple of parts as they age that can fail and cause random shutdowns.
The pump
Fan
Diverter valve
Printed circuit board (PCB)
Sensors (temperature/pressure)
In theory, these are things you should be able to fix yourself but any good engineer will sniff them out in a matter of seconds.
Gas Safe engineer needed
If you have checked the pressure settings and are still finding your boiler cutting out then get in touch straight away to call an engineer to help.
Safety notice: This type of repair should never be done on your own. Only use a Gas Safe registered engineer for gas appliances
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