14
warmhaus.com
Error
Code
Description of the Error
Malfunction
Probable Cause
Solution(s)
E 79
Min regulation current value
reached
Boiler does not work, E79 error
code flashing on the screen
> Gas inlet pressure
> Aging or rust on the
electrode
> Recirculation on fluegas path
> Blockage in flue or wrong
flue
> Electrode position
> Cabling disconnections
> Combustion calibration
> Electronic board
> Gas valve failure
1) Call for authorised service
E 80
Problem on electronic gas
valve driver
Boiler does not work, E80
error code flashing on the
screen
> Electronic board
> Gas valve failure
1) Call for authorised service
E 81
Lock-out for combustion
problem at starting (1)
Boiler does not work, E81 error
code flashing on the screen
> Strong flue blockage
> Combustion problem
> Wrong flue
> Gas inlet pressure
> Aging or rust on the
electrode
> Recirculation of exhaust gas
into fresh air
> Electrode position
> Combustion calibration
1) Call for authorised service
E 84
Capacity reduction for
detected (supposed) low gas
inlet pressure
Boiler operates at limited
capacity,
E84 error code flashing on the
screen
> Gas inlet pressure
> Combustion problem
1) If there is strong wind wait until the wind stop then RESET the
boiler
2) IF problem persist Call for authorised service
E 87
Problem on electronic gas
valve circuit
Boiler does not work, E87 error
code flashing on the screen
> Cabling disconnections
> Gas valve failure
1) Call for authorised service
E 88
Fault of electronic gas valve
managing circuit
Boiler does not work, E88 error
code flashing on the screen
> Cabling disconnections
> Gas valve failure
1) Call for authorised service
E 89
Problem on combustion
feedback signal
Boiler does not work, E89 error
code flashing on the screen
> Aging or rust on the
electrode
> Recirculation of exhaust gas
into fresh air
> Blockage in flue or wrong
flue
> Electrode position
> Cabling disconnections
> Combustion calibration
> Electronic board
> Gas valve failure
1) Call for authorised service
E 90
Unable to regulate
combustion
Boiler does not work, E90
error code flashing on the
screen
> Aging or rust on the
electrode
> Recirculation of exhaust gas
into fresh air
> Blockage in flue or wrong
flue
> Electrode position
> Cabling disconnections
> Combustion calibration
> Electronic board
> Gas valve failure
1) Call for authorised service
E 92
Air compensation active
Boiler does not work, E92 error
code flashing on the screen
> Possible wind precence
> Aging or rust on the
electrode
> Recirculation of exhaust gas
into fresh air
> Blockage in flue or wrong
flue
> Electrode position
> Combustion calibration
> Min power adjustment
1) Call for authorised service
E 93
Unable to regulate
combustion (temporarily)
Boiler does not work, E93 error
code flashing on the screen
> Aging or rust on the
electrode
> Recirculation of exhaust gas
into fresh air
> Blockage in flue or wrong
flue
> Electrode position
> Combustion calibration
> Gas valve failure
> Electronic board
1) Call for authorised service
