If your CO detector is the type that is a little plastic square with the dot
that turns black in the presence of CO, that kind has a service life that is
rather short. Then it stops working. Is yours fresh?


"O. Sami Saydjari" wrote in message
...
When I use my (cabin air) heater, it starts to smoke a bit and smell if I
turn it more than half way up. I suspect that this is coming from a build
up of material in the heat conduits over the years. Does anyone else
experience this? Should I have my heating hoses removed and cleaned
(seems expensive if I have my mechanic do it)? Could there be something
more significant going on (by the way, I have a CO detector, I have not
significant CO, so I know that I do not have exhaust fumes leaking into
the cabin air heating system)? Suggestions?


-Sami
N2057M, Piper Turbo Arrow III