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Screen Display
B l o c k i n g E r r o r
E 39
F l u e G a s E r r o r
L
13 - TROUBLE SHOOTING
Low water cutoff sees no water.
Flue temperature sensor sees temperature
3
higher than 200°F.
Return water temperature sensor sees
temperature higher than 200°F.
Control board internal error. Power down then
power up boiler. If error repeatedly occurs
replace control module.
Boiler is powered by three wires, hot, neutral
and ground. E44 displays when neutral wire is
not neutral.
Control board sees power supply frequency not
in range of 59 to 61 Hz.
Boiler power supply ground wire is not
grounded.
Control board internal error. Power down then
power up boiler. If error repeatedly occurs
replace control module.
Supply temperature sensor is open. No
continuity.
Return water temperature sensor is open. No
continuity.
Flue temperature sensor is open. No continuity.
Note: If "L" indicator appears Flue Sensor is
open.
Supply water temperature sensor is shorted.
'0' Ohm
Return water temperature sensor is shorted. '0'
Ohm
Flue temperature sensor is shorted. '0' Ohm
Reset button was pressed too many times.
Fault detected in blower motor system.
Explanation
52
Go to Page For
Troubleshooting
Go to Page 59
Go to Page 60
Go to Page 61
Replace Control
Module
Go to Page 61
Go to Page 62
Go to Page 63
Replace Control
Module
Go to Page 63
Go to Page 64
Go to Page 65
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Go to Page 66
Error Clears in 1-2
minutes
Go to page 62
PN 240011320 Rev. G 10/01/2021]
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