Glow-worm Flexicom fault S.97

Water pressure sensor check is running, demand (DHW or heating) is blocked

Gas boiler

What it means

A water pressure sensor check is in progress, blocking DHW or heating demand.

Likely causes

  1. Pump seized
  2. Boiler water temperature falling below 8°C

Where to start

  1. Check connection to pressure sensor
  2. Check pump has not seized
  3. Confirm gas and electric supplies are ON.

The full answer, free

  • 28 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 38), right under the answer

Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.

From the Glow-worm manual for the Flexicom. Check the model on the data plate before you order parts.

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