LAARS Mighty-Stack TL00-199 - Installation, Operation and Maintenance Instructions - Manual (Page 19)

Mighty Stack Water Heater Page 19
3F. Electrical Troubleshooting
The procedure listed on the next page allows you
to quickly check the key parts of the electrical and
control systems. You will need a volt-ohmmeter to
perform these tests.
WARNING
Disconnect the power supply to the boiler before
doing any electrical work. Electrical shock can
cause severe personal injury or death.
Caution
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
See the wiring diagram in Figure 12. Figures 2
and 11 show the locations of the parts in the unit. To
reach the control wiring, remove the control box cover
on the front of the water heater.