CBFF - Combi boiler noise.

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The flashcards below were created by user zenken79 on FreezingBlue Flashcards.


  1. Fan runs noisily
    • Fan unbalanced.
    • Bearings wearing out.
    • fan slipping on shaft.
  2. Solenoid Noise
    • Mounting loose
    • Return spring loose
    • Solenoid failing.
  3. Heat exchanger noise
    • Kettling due to sludge/scale build up.
    • Pump failing causing water to overheat.
    • Pump/fan over-run faulty causing water to overheat.
    • Pump/fan over-run thermostat/thermistor failing or failed.
    • Limit thermostat failed so water overheated to overheat thermostat.
    • By-pass valve incorrectly set.
    • Banging noise when hot water draw off point turned off.
  4. Explosive ignition
    • Armature in gas valve sticking.
    • Burner injector oversized.
    • Gas rate too high.
    • Pilot burner assembly incorrectly positioned.
  5. Pump noise
    • Air in system/pump.
    • Dry running of pump.
    • Impellor out of balance due to wear and tear.
    • Pump buzzing caused by selector switch.

Card Set Information

Author:
zenken79
ID:
313692
Filename:
CBFF - Combi boiler noise.
Updated:
2016-01-03 23:42:08
Tags:
Gas
Folders:
fault finding
Description:
Combi boiler noise
Show Answers:

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