A.O. Smith FPS 75 Technical Information page 81

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK
FPS 75 SERVICE AND OPERATION
cont.
BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.
Trouble-
shooting cont.
RESULTS
If:
then:
replace the air pressure switch
the meter does not read 24 VAG
the meter does read 24 VAG,
go to Step 2.
Line=24 V AC supply
Load=Wire carrying current onto high limit