Hi All:

I hope this is the right place to post this problem.

Yesterday morning my 1 year old hi efficiency gas furnace would not fire.
The problem was easy to find and fix. The air intake was plugged with frost
(ice crystals). It would appear that some freak condition caused it to suck
in its own exhaust which condensed and plugged the intake. A call to the
service technician informed me that this problem is rare but can occur
under the right conditions of temperature, wind, humidity, etc, etc. He said
it may never happen again but that I should always be wary of it. I don't
think that there is a problem with the installation as there is about
eighteen inches of separation between intake and outlet.

The technician's explanation makes sense to me but I still think that there
may be something else I can do to prevent this from happening again? I am
going away for a weekend in February and don't want my house to freeze.

Do you have any ideas ?

Note: The furnace keeps cozy a house in Northern Ontario where it has been
bitter cold with temps approaching minus 40. It was also quite frosty the
morning this problem occured. Also, this installation ran trouble free all
of last winter.

Thanks in advance for any and all replies.

John Buffett