Robert11 wrote:

Hello:

I recently had installed a new hot air furnace, that also has an Evaporator
section in it for the house air conditioning.

Last night, a thunder storm passed thru the area.
Nothing really major; have certainly seen worse.
A bit of lightning, etc.

Lights flickered for a few seconds.
This is the first time since the new installation that we had this type of
storm.

Anyway, the main circuit board in the furnace fried.

Surprisingly, nothing else in the house suffered any damage, whatsoever.
Even the PC's still work. Of course most of the other items
in the house are plugged into power extension strips with overvoltage and
spike protection; perhaps this saved them ? Hard to know for sure, though.

The furnace (110 V) is, of course, hard wired to the house wiring via a
dedicated circuit breaker.

My question is:

Would really hate to have it happen again.

Is there any kind of circuit breaker we can change to that has this spike
and overvoltage protection ?

Or, what might you folks recommend ?

much thanks,
Bob



I would add a hefty surge suppressor (GOOGLE)
right where the branch ckt enters the furnace.

The furnace mfr's have known about this flaw
in the control boards for a decade or more.
It represents a lucrative income stream for them
(and for their service firms).

Jim