Troubleshooting
311075ZAB
35
No heat, and heater indicator light is
off.
Heater Power shut off, or circuit
breaker tripped.
Cycle heater power off, then on to
reset circuit breaker.
Bad thermostat.
With power on, check for continuity at
clicks of heater control knob. To
replace thermostat, see your heater
manual.
Bad overtemperature sensor (this is
a high temperature limit fuse and
must be replaced if blown).
With power on, check for continuity at
overtemperature sensor. To replace
sensor, see your heater manual.
Loose heater cable connections.
Check connections at Heater Power
switch. See F
No heat, but heater indicator light is
on.
Bad heater cartridge.
Check for continuity at heater
cartridge connections: 16-18.6 ohms
for 120 V, 64-75 ohms for 240 V.
Heater on one side shuts off early or
continuously during recirculation.
Y-strainer is plugged on that side.
Clean or replace strainer, see
, page 27.
Fluid inlet valve (52) closed.
Open valve.
PROBLEM
CAUSE
SOLUTION
