15MSPA-MP Metapacks Service Manual
Flashing dots and LED Flow Chart
Take water temperature
with a digital thermometer.
Are you getting correct
water temp. reading on the display?
yes no
Replace
board if
error
condition
still persists.
Verify if
temperature probe
is properly connected.
If so, replace probe
and reset breaker.
Verify if
temperature probe
is touching water
or if cold air from
back can affect
reading.
Is HL probe
properly connected?
Clean pins, reconnect
it, and reset
the breaker.
Verify if anything
is obstructing water
flow (closed traps or
dirty filters).
If error condition
persists, replace probe
and reset breaker.
When error
condition occurs,
does heater
barrel feel hot?
yes no
If error condition still
persists, replace board.
Turn breaker off then on again to reset the system.
If Hi-Limit condition no longer persists,
check for blockage of water in the piping.
If error condition occurs (potential Hi-Limit sensor or temperature probe
problem), follow Troubleshooting Flow Chart below to identify the problem:
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