Thermo Products GMD1-60N, GDM1-80N service manual Is There Line Voltage Across Inducer Power

All installations and services must be performed by qualified service personnel.

Yes Yes

IS THERE LINE VOLTAGE

ACROSS INDUCER POWER

TERMINALS "IND" & "IND N"

AT THE INTEGRATED CONTROL?

Yes

CHECK WIRING TO INDUCER

AND IF OK, REPLACE

INDUCER ASSEMBLY.

No

CHECK THE INTEGRATED

CONTROL DIAGNOSTIC LED LAMP. RESET BY INTERRUPTING POWER TO CONTROL FOR MORE THAN ONE SECOND. IF LED STAYS ON CONTINUOUSLY, REPLACE INTEGRATED CONTROL.

DOES THE HOT

SURFACE

IGNITOR ENERGIZE

AND GLOW?

Yes

	IS THERE LINE VOLTAGE
No	ACROSS HOT SURFACE	No
	IGNITOR TERMINALS
	"IGN" & "IGN N" AT THE
	INTEGRATED CONTROL?

Yes

CHECK WIRING TO HOT

SURFACE IGNITOR AND

IF OK, REPLACE HOT

SURFACE IGNITOR ASSEMLBY.

CHECK THE INTEGRATED CONTROL DIAGNOSTIC LED LAMP. RESET BY INTERRUPTING POWER TO CONTROL FOR MORE THAN ONE SECOND. IF LED STAYS ON CONTINUOUSLY REPLACE INTEGRATED CONTROL.

AFTER HOT

SURFACE IGNITOR WARM-UP, DOES GAS VALVE OPEN?

Yes

No

CHECK ACROSS "MV"

TERMINALS ON INTEGRATED

CONTROL FOR 24 VOLTS DURING THE 4 SECOND FLAME PROVING PERIOD AFTER IGNITOR WARM-UP. IS THERE 24 VOLTS?

Yes

CHECK WIRING TO GAS

VALVE AND IF OK,

REPLACE GAS VALVE.

No

SAME AS ABOVE

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