Detectors

[Gardner Yeaw]

Everywhere I look there is a detector in my '78FC33. The main panel
in the dining area does not work, but I would like to resurect the
system and get all the detectors working. Does anyone out there have
information on how the detectors work and how to test and/or get them
working again? I assume some are LP and some are CO, but I don't know
for sure.

Thanks, Gardner
78FC33