Trane S8B1A040M3PSC Installation, Operation And Maintenance Manual page 73

DEFINITION: External Gas Valve
Circuit Error (24 volts is present
when it should not be present)
S8XB-SVX001-1B-EN
7.1 Fault Code
Turn Comfort
Control to "OFF"
posi on
Is 24 VAC nominal voltage present
between Red lead at gas valve
connec on to chassis ground?
NO
Replace IFC
T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
Correct wiring
YES
Check opera on
73