Boiler Thermostat Issues
When your thermostat stops communicating with your boiler — the boiler won't fire when you turn up the heat, or it runs constantly regardless of setting — you have a control system fault. This could be a simple battery issue, a wiring fault, RF signal interference, or a failing thermostat or receiver unit.
Modern smart thermostats (Nest, Hive, Tado, Bosch EasyControl, Navien NaviLink) add complexity: they communicate via WiFi, RF, or proprietary protocols. When the link breaks, your boiler either runs constantly or not at all. Our technicians can diagnose and fix both traditional and smart thermostat systems.
Common Thermostat Faults
Dead batteries (the most common and simplest fix), RF interference between wireless thermostats and receivers, faulty wiring on wired thermostats, failed relay in the receiver unit, WiFi connectivity issues on smart thermostats, firmware bugs requiring a reset, or a faulty boiler control board that won't respond to thermostat calls.
Our Thermostat Diagnostic Process
We test the thermostat and receiver independently, checking signal transmission, relay operation, and boiler response. For smart thermostats, we verify WiFi connectivity and app communication. Once diagnosed, most fixes are quick — a new battery, receiver re-pairing, or wiring repair. We provide fixed quotes for any component replacements.
This is not a DIY repair
Combi boilers are gas-fired appliances regulated under the BC Safety Standards Act. Opening the unit, touching the gas valve, or working on the flue without a valid BC gas-fitter licence is both unsafe and illegal. Diagnosing the fault is helpful — fixing it should always be left to a certified technician.
Call 778-909-5731Frequently Asked Questions
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