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Glow-worm Energy Combi fault P.05

Filling the product

Gas boiler

What it means

The prioritising diverter valve is moved to the mid-position. The burner and pump are switched off (to fill or drain the product). If the pressure is lower than 0.05 MPa (0.5 bar) and then is above 0.07 MPa (0.7 bar) for longer than 15 seconds, the automatic purging function is activated. The function is activated for 15 minutes.

Likely causes

  1. Radiators not heating sufficiently at factory setting
  2. Noises produced in radiators or radiator valves

Where to start

  1. Activate P.05 to fill or drain product with diverter valve in mid-position
  2. Monitor system pressure for automatic purge trigger (below 0.05 MPa then above 0.07 MPa for 15+ seconds)
  3. Flush the heating installation through

The full answer, free

  • 8 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 46), right under the answer
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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 Energy Combi. Check the model on the data plate before you order parts.

Other Glow-worm Energy Combi fault codes