A faulty boiler can leave your house feeling cold and uncomfortable at certain times of the year, particularly when you depend on it for both heat and hot water. However, calling in a heating engineer is necessary for serious concerns; there are a few minor boiler faults that can be fixed with a few checks.
Before you make assumptions, take a few minutes to check your boiler. Sometimes, small issues like low pressure, trapped air, or thermostat problems can be resolved with no intervention from the technician.
By following the four practical methods, you may be able to resolve the issue with your boiler without having to seek assistance from someone else.
Check and Adjust the Water Pressure
A boiler has a pressure gauge that shows the water pressure in the system. If the pressure drops below the normal operating range (typically 1.0-1.5 bar), you can manually add water to the system via the filling loop. You must review the boiler manual before making any adjustments to avoid overpressuring the system, which can cause issues.
Perform a Boiler Restart
Modern boilers commonly include a reset switch that will fix minor faults or temporary glitches. Surprisingly, if your boiler has stopped working, you need to:
- Find the reset button (on the front panel)
- Press and hold it as instructed
- Wait for the boiler to reboot
This easy fix may restore your boiler to normal operation if it has malfunctioned due to a minor issue.
Release Trapped Air from Radiators
If you have some radiators with cold tops and warm bottoms, an air pocket is likely trapped in the radiator, preventing proper water circulation. To release trapped air from your radiator, use a radiator key and gently turn the air vent until water starts to flow steadily. Venting your radiators will help localise the heat in your living area and reduce stress on your boiler during operation.
Check and Replace the Thermostat batteries
A non-responsive thermostat may make it appear that your boiler is having issues. Check the thermostat battery level in your room and replace the batteries if needed. New batteries can help ensure your heating system receives accurate signals from the thermostat, so it operates as effectively as possible. A properly functioning thermostat ensures reliable communication with your heating system.
How to Prevent Future Boiler Problems?
Regular service will make it much less likely that your heating system breaks down and ensure your boiler functions properly. You should follow these basic preventative measures:
- Arrange for professional service at least once per year to check all components of your boiler and ensure they are operating safely.
- Make sure there is always enough pressure in your boiler, check it at least once a week and keep it within the normal range (approximately a bar to 1.5 bar).
- Vent your radiators once a year (this will eliminate the accumulation of air in the system) so that your heating system is working optimally.
- Make certain that your thermostat has fresh batteries (replace them when they begin to deplete) and check that it is programmed correctly at least once a month.
Final thoughts
Many boiler issues do not require calling a boiler engineer immediately. Simple problems associated with low boiler water pressure, resetting the system, radiator venting, and thermostat battery replacement can often be resolved by performing these simple tasks. If none of the above helps resolve the issue, contact a qualified heating engineer to prevent further damage to your boiler and ensure it remains safe and functional.