Can you replace the high-limit thermostat on my Bosch boiler?

Yes. We supply and professionally install the genuine part across Greater Vancouver. Our licensed technicians diagnose the fault, fit the correct OEM part, and test the system.

Do you sell the Bosch high-limit thermostat on its own?

No. Boiler parts are supplied and installed by our licensed technicians as part of a repair — we do not sell parts for individual or DIY purchase. We install the Bosch high-limit thermostat as part of a certified repair so it is fitted correctly, tested for safety, and keeps your Bosch warranty valid.

How do I know my Bosch high-limit thermostat has failed?

Typical symptoms include: Boiler locks out on overheat; Repeated high-limit trips; No heat after a trip; Burner cuts out at temperature. On Bosch boilers this can also show as EA No Flame or E9 Overheating. We confirm the diagnosis before any work.

Bosch · Safety

Bosch High-Limit Thermostat Replacement in Greater Vancouver

Genuine Bosch high-limit thermostat, supplied and professionally installed by Technical Safety BC–licensed gas fitters. Never sold for DIY.

Call (604) 359-1081 Request Service

The High-Limit Thermostat on Your Bosch Boiler

The high-limit thermostat is a safety control that shuts the burner off if water temperature exceeds a safe maximum, protecting the boiler and home from overheating. Repeated trips signal a circulation or sensor problem that must be fixed, not bypassed.

On Bosch systems — including models such as Greenstar, Greentherm, Tronic — a failing high-limit thermostat often shows up as ea no flame or related symptoms. We diagnose it precisely and install the correct genuine Bosch part.

Typical Lifespan

10-15 years

Brand

Bosch

Part Category

Safety

Safety Warning

A high-limit that keeps tripping is protecting you from a real overheating cause — never just reset and ignore it.

Signs of a Failing Bosch High-Limit Thermostat

Boiler locks out on overheat

Repeated high-limit trips

No heat after a trip

Burner cuts out at temperature

Parts Are Professionally Installed — Not Sold for DIY

For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.