On Fri, 17 Oct 2003 04:57:08 GMT, am (Laurie Forbes) wrote:
Anyhow, the dealer also mentioned that line voltage noise and spikes
can also glitch the processor so I am thinking of installing a surge
suppressor in the line input. One way would be to use a suppressor
typically used for electronic equipment such as computers but they are
plug in rather than permanent wired. Any comments on using such a
device (by installling a plug in the furnace line and plugging it into
the suppressor) would be appreciated, or, any other suggestions.

Microcenter (computer retailer) recently had 300 watt UPS units on
sale for $19.95. That's cheaper than replacement batteries, which
my old UPS needed. I bought 1, then went back and bought 2 more
before the sale ended. They work great, and have excellent built in
suppression. Being UPSs, they would keep the uP control from
losing its settings during short power failures too.

So if the problem really is glitches on the line, I'd recommend
something like this. My furnace controls already have a switch
and receptacle feeding the control transformer (required by Code
for crawl space furnaces), so it would be the work of but moments
to add one of these UPSs.

Gary