Published boiler fault diagnostics

Baxi 800

The Baxi 800 boiler intermittently heating without a fault code can be attributed to several common issues, including low system pressure, circulation problems, or issues with the thermostat or diverter valve. While no specific fault code was provided, common Baxi fault codes related to heating issues include E119 (low pressure) and E125 (circulation fault). It's crucial to address these systematically, prioritising safety and checking the simplest causes first.

worcester greenstar cdi

The Worcester Greenstar CDi is a condensing combination boiler. The symptom of 'won't come up to heat' without a specific fault code can indicate several issues, ranging from basic user settings to component failures. Common causes include low system pressure, issues with the gas supply, condensate blockages, or problems with key components like the fan, ignition electrodes, or PCB. There are no specific service bulletins for a general 'no heat' fault, but manufacturer documentation and reputable trade sources highlight these common failure modes.

Worcester Bosch Greenstar

Frequent pressure drops on a Worcester Bosch Greenstar boiler typically indicate a leak within the sealed system, a faulty pressure relief valve (PRV), or an issue with the expansion vessel. While repressurising the system can offer a temporary fix, persistent drops require a thorough diagnosis by a Gas Safe registered engineer to identify and rectify the underlying cause.