If the boiler continues to run after the timer has been turned off, it means your boiler system needs to be examined further. A thermostat, programmer, timer, motorised valve, pump, and heating element are all common parts of the heating system and one of these components could be the cause of the issue.

In this blog, our heating engineers in Telford, Newport and Atterley go through a few things you can look out for which can help fix the issue but if you prefer speaking with a qualified heating engineer, call us on 01952300008 and we'll be happy to help.

So, why is my boiler on when the timer is turned off?

Have you checked the valves?

Many valves, including motorised valves, water valves, and check valves, are found in boilers. Each valve serves a distinct purpose, for example, water valves control the flow of hot water in your heating system by opening and closing, causing them to become stuck or broken since they are constantly working throughout the day. Even if your timer is switched off, hot water will continue to flow through your boilers, causing your boiler to stay on.

Signs of valve issues include:

- Hot water flowing when the timer is off

- Radiators heating up unexpectedly

- Unusual noises coming from the valve area

We recommend checking for visible damage or leaks near the motorised valve, which is typically located close to your boiler.

Has the thermostat malfunctioned?

Many heating systems have the ability to detect when the water temperature has dropped below a predetermined level. If it senses a higher-than-set water temperature, it will automatically the heating in your home off. If your programmer has malfunctioned, it will keep your boiler running long after the desired temperature has been reached. To test if this works, try decreasing and then boosting the temperature on your thermostat.

Try adjusting your temperature settings and observing how your boiler responds. Make sure your thermostat isn't positioned near heat sources or in direct sunlight, as this can affect its accuracy.

Are you experiencing any wiring issues?

Because of a wiring fault, your boiler may turn on after the timer has been switched off.

Common wiring problems include:

- Loose connections

- Damaged wires

- Short circuits

While basic visual inspections can identify obvious problems, we strongly advise against attempting electrical repairs yourself. Our qualified engineers can safely assess and repair any wiring issues affecting your heating system.

Do You Have Any Power Supply Issues?

Reliable power supply is crucial for proper boiler operation. Power outages, tripped circuit breakers, and overloaded circuits can all affect your boiler's timing. We recommend checking your fuse box for tripped breakers and ensuring the isolation switch near your boiler remains in the 'on' position. For homes experiencing frequent power issues, we can advise on protective measures.

Are There Signs of Internal Boiler Faults?

Several internal boiler issues can cause continuous operation. These include insufficient system pressure, burner blockages, and frozen condensate pipes during cold weather. Regular maintenance helps prevent these issues, but if they occur, our heating engineers can quickly diagnose and resolve the problem.

Contact Gas Engineers Newport, Telford, & Shrewsbury

Our heating experts are available throughout Telford and the surrounding areas, including Newport, Atterley, Shifnal and Shrewsbury. Simply call us on 01952300008 and we'll be happy to help.

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