Thermo Pride Gas/Propane Furnace Premiere Series 2-Stage CHX3 - Manual (Page 57)

All installations and services must be performed by qualified service personnel.
51
IS IGNITOR
POSITIONED CORRECTLY?
REPOSITION TO
CORRECT LOCATION
CHECK AND CLEAN BURNERS
DO BURNERS STAY
LIT PAST PROOF OF
FLAME CHECK?
IS W2 ENERGIZED?
DOES INDUCER
GO TO
HIGH SPEED?
IS THERE LINE
VOLTAGE ACROSS
INDUCER POWER
TERMINALS "IND HI"
TO "IND N"?
REPLACE
THE 50V61-143
CONTROL.
CHECK CONNECTIONS
TO INDUCER. IF OK,
REPLACE INDUCER.
DOES BURNER
STEP TO HIGH FIRE?
IS THE HIGH FIRE
PRESSURE SWITCH
CLOSED?
YES
NO
YES
NO
NO NO
YES
YES
YES
YES YES
NO NO
NO
OK
CHECK FLAME PROB2
AND WIRE AND CHECK
POLARITY ON INCOMING
POWER AND GROUND
CHECK
CONTACTS
IN HIGH
FIRE SWITCH
AND FOR
BLOCKAGE IN
FLUE. IF OK,
REPLACE DUAL
PRESSURE
SWITCH.
CHECK FOR PROPER LINE
AND MANIFOLD PRESSURE
REFERENCE GAS
PRESSURE CHART PAGE 31.