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Boiler Fault Finder

System Component Testing

Thermostats

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Potentiometers

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Thermistors

Thermistor faults Thermistors work in conjunction with the user potentiometer (boiler setting for te
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Fans

Reasons a fan will fail to start No 240V supplying (L) & (N) terminals Burnt out motor windings
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Pumps

Reasons a pump will fail to start: No 240V supplying (L) & (N) terminals Faulty capacitor Rotor
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