TECHNICAL ASSISTANCE SERVICE
31
FAULT
CAUSE
CORRECTIVE ACTION
The boiler keeps shutting
down, and the control panel
warning light comes on
Control thermostat problem
No water supply
Air in the circuit
Check functioning of thermostat
Check the temperature setting
Check the electrical wiring
Check the sensors
Check the circuit pressure
Check the vent valve
The boiler becomes dirty
very quickly
Burner badly adjusted
Blockage in stack
Burner air intake dirty
Check the adj. of the burner
(perform flue gas analysis)
Clean the flue gas pipes and
stack
Clean the burner air intake
The boiler does not reach its
temperature setpoint
Boiler dirty
Boiler and burner mismatched
Insufficient air/fuel flow to
burner
Control thermostat problem
Clean the flue gas pipes
Check specifications and
settings
Check and adjust the burner
Check the functioning of the
thermostat
Check the temperature setting
TROUBLESHOOTING
The safety valve keeps
opening
Circuit pressure too high
Problem with heating system
expansion vessel
Check the circuit pressure
Check pressure reducer
functioning
Check pressure reducer setting
Check the efficiency of the
expansion vessel
The boiler has reached
the set temperature but the
radiators are still cold
Air in the circuit
Pump malfunctioning
Problem with minimum temp.
thermostat (if present)
Bleed the circuit
Check/unseize the pump
Check the temperature setting
There is a smell of fumes
Fumes escaping into the air
Clean the boiler body
Clean the flue gas pipes
Check that the boiler, flue gas
pipes and stack are all properly
sealed
Check the door seal
