Lennox GWM-050IE User Manual

61
Disconnect harness from
Control Module J5. Measure
resistance between brown
wires at terminals J5-4 and J5-
12. Is resistance less than 50
ohms?
_ P _ _ _
Blocking Error E 6 0 Return sens shorted
Disconnect harness from
Return Temperature Sensor.
Measure resistance across
sensor terminals. Is resistance
less than 50 ohms?
NOYES
Replace wires
YES NO
Replace Return Water
Sensor
Replace Control
Module
Disconnect wire harness from
Vent Temperature Sensor.
Measure Sensor resistance.
Does resistance match
estimated flue temperature?
NOYES
_ P _ _ _
Blocking Error E 6 5 Flue Sens Shorted
Replace Vent
Temperature Sensor
50 to 9010 to 32 9K to 24K ohms
150 to 200
90 to 130
°F°C Resistance
130 to 150
2K to 1K ohms 2K to 3K ohms 3K to 9K ohms
54 to 66 32 to 54 66 to 94
Vent Temperature Sensor
Resistance Chart
Disconnect harness from
Control Module J5. Continuity
in blue wires?
YES NO
Replace Control
Module
Replace wires
13 - TROUBLE SHOOTING

Lennox GWM-050IE Specifications

General

Brand	Lennox
Model	GWM-050IE
Category	Boiler
Language	English