A.O. Smith TC-049-R2 Service Handbook, Residential Gas And Electric Water Heater, Complaint, If …

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Residential Electric – continued

C-2 – service continued

Complaint: No Hot Water

Conditions:

Tank water cold

Power on

Procedure:

Multimeter set for

AC voltage check

	Voltage Checks
Test voltage between 1 and 3 or L1 and L3 of high limit.
If …		… then
rated voltage is not present		• check circuit breaker (fused disconnect)
		• check wire connections in heater junction
		box
		• check position of heater ON/OFF switch-if
		applicable.
rated voltage is present		continue to next step.
Test voltage between 2 and 4 or L1 and L4 of high limit
If …		… then
rated voltage is not present		• press high limit reset button
		• replace high limit (after conducting
		thermostat check)
rated voltage is present		continue to next step.
Test voltage between 4 and 2 or T2 and L4
If …		… then
rated voltage is not present		• check jumper between high limit 2 and
		thermostat 1or
		• on T2, L4 test-replace control.
rated voltage is present		continue to next step.
A.O. Smith Water Products Company	32		Training Department
©2002			Ashland City, Tennessee