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Ideal Logic fault FD

No water flow

Gas boiler

What it means

Water flow sensor detects no circulation in heating system

Likely causes

  1. Pump not rotating
  2. Pump electrical connection fault
  3. Water flow sensor connector loose
  4. Water flow sensor fault

Where to start

  1. Turn power off and on, check if pump rotates
  2. Check pump electrical connection
  3. Check water flow sensor connector security

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 49), 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 Ideal manual for the Logic. Check the model on the data plate before you order parts.

Other Ideal Logic fault codes