Interruption, Return sensor,
The NTC plug not plugged in or has come loose, the multiple plug on the PCB may not plugged in correctly, interruption in cable harness, NTC defective and may need to be replaced.
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Landlord Gas Safety Inspections
Enfield, Cheshunt, Ware, Hertford, Harlow, Edmonton, Tottenham, Loughton, Chingford
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Call us now on 01992 308232
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