66 MSPA-MP Metapacks Service Manual
7• Unslot AMP or J&J mini
connectors from side of
the pack.
5• Disconnect high limit sensor
and pressure switch cable.
6• Disconnect heater output
by removing two screws at
the bottom of circuit board.
8• The circuit board is supported by a
metal plate, with the entire assembly
being held in place by 5 screws (one
attached to ground wire). Remove
screws and disengage the defective
board/plate assembly (Note: trans-
former remains attached to board.)
9• Correctly align replacement board/
metal plate assembly with original
screw holes and reattach to board
with 5 screws.
10• Now, reinsert J&J mini connector
to pack side.
11• Switch transformer from one
plate to the other.
12• Re-connect heater cables.
13• Re-connect pressure switch and
high temperature sensor cables.
14• Verify all connections. Reposition
plastic cover.
15• Re-connect keypad(s) and
temperature sensor connections.
16• Re-connect power cable and
turn power back on.
How To Replace The Board
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