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BTR TANK TYPE HEATERS
SERVICE HANDBOOK
A.O. Smith Water Products Service Handbook
Irving, Texas ©2000 Training Department
19
TROUBLESHOOTING BTR WATER HEATERS
To troubleshoot a BTR water heater check that:
•
120 VAC is supplied to the heater
•
the tank is full of water
•
gas is supplied to the unit
STEP 1 TEST THE TRANSFORMER
STEP 1 - TO TEST THE TRANSFORMER
- Using a multimeter, test for 24 VAC
between the secondary transformer terminals.
IF THEN
The meter does not read 24 VAC:
•
Check that the 120 VAC is supplied
from the On/Off Switch – if not, replace
switch.
•
Check that the 120 VAC is supplied
from transformer.
The meter reads 24 VAC:
•
Go to step 2.