A.O. Smith BTH 120 Service And Parts Manual page 24

STEP 6. (continued)
IF...
24 VAC is not present
24 VAC is present
STEP 7. 24 VAC THRU ECO (ECO IS NOT A THERMISTOR).
Reinstalled plug.
Check for 24 VAC from back of red 1 plug to ground.
IF ...
24 V A C is not pres ent
24 V A C is pres ent
N ote: R es is tanc e thru E C O - plug red 1 to plug red 4 - is .5 o
A. O. Smith Water Products Company
©
Irving, Texas 2000
TROUBLESHOOTING
THEN
replace
go to St
STEP 7 - TEST FOR 24 VAC THRU ECO
23
TH E N
replac e
go to s t
Service Handbook
Training Department