Thermostat & Timer Servicing London

If your heating is coming on at the wrong time, not reaching the set temperature, or your programmer is showing a fault, the problem could be with your controls, not the boiler itself. Our service checks your room thermostat, programmer or timer to diagnose the fault accurately, so you don't replace parts unnecessarily. A Gas Safe registered engineer will test the wiring, signals and operation of your heating controls to determine if they are working correctly or if a fault lies elsewhere in the system. If a replacement is needed, we will explain the options and provide a clear quote. No work beyond the initial diagnostic check will be carried out without your approval first.

Book a service See pricing

Pricing for thermostat and timer diagnosis, repair or replacement is confirmed by a personalised quote after our engineer's assessment. This ensures you only pay for what is needed for your specific system. For typical UK market price ranges for other common services like an annual boiler service, please visit our pricing page.

What you get

Diagnosis: Our engineers identify whether a fault is in the thermostat, timer, programmer or the boiler itself, saving you from unnecessary replacements.
Testing: We check electrical connections, signal continuity and the physical operation of your heating controls against the boiler's response.
Replacement: If your controls are faulty, we can fit a direct replacement unit, including connecting a smart thermostat you may already own.
Clarity: We explain the fault in plain terms and confirm the solution and cost before any repair work begins.
Safety: All work is carried out by fully qualified and Gas Safe registered engineers, ensuring it is done safely and correctly.
Efficiency: Correctly functioning controls help your heating system run as intended, avoiding wasted energy from incorrect timing or temperature settings.

How it works

A method, not a guess

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On-Site Diagnosis

The engineer will test your heating controls and boiler to pinpoint the exact cause of the fault.

Clear Explanation & Quote

You will receive a plain-English explanation of the fault and a detailed quote for any recommended repair or replacement.

Approval & Completion

Once you approve the quote, the engineer will complete the work, which may involve repairing connections or fitting a new thermostat or timer.

Questions

Thermostat & Timer Servicing FAQs for London homeowners

How do I know if my thermostat or timer is faulty, and not my boiler?

Common signs include heating that comes on at the wrong time or not at all when the boiler seems functional, a room temperature that doesn't match the thermostat setting, or a fault code on the programmer display. Our engineer can test the controls and the boiler's response to diagnose the issue accurately.

Can you connect a smart thermostat I've bought myself?

Yes. If a replacement is needed and you already own a compatible smart thermostat, our Gas Safe registered engineers can professionally disconnect your old controls and wire in the new smart unit for you.

Is a landlord responsible for thermostat and timer repairs?

Yes, landlords are generally responsible for ensuring the heating system and its controls are in good working order. While a faulty thermostat isn't a gas safety issue, it is part of the property's heating system which a landlord must maintain.

Do you need to be Gas Safe registered to work on a thermostat?

While wiring a thermostat is electrical work, our engineers are qualified to work on the heating system. More importantly, any investigation of a heating fault requires checking the boiler's operation, which is gas work and must only be done by a Gas Safe registered engineer.

Will fixing my controls affect my boiler's warranty?

Having faults diagnosed and repaired by qualified professionals should not affect a valid warranty. Most boiler manufacturers require an annual service by a Gas Safe engineer to keep the warranty valid, but this is separate from control repairs.

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