ap wrote:
Correction - it's not an electric heater, but rather a gas heater.
And it sits in the attic.

ap wrote:
Hello,
We've purchased a home 3 1/2 years ago, but haven't done any
maintenance/cleaning of the electric furnace. This furnace sits
in the attic above the second story.

The house is about 7 years old, and we don't know if previous
owner did any maint work.

From your experience, is periodic maintenance/tune-up of the
furnace needed and beneficial ?

Thanks!

In this case I would suggest calling our a professional HVAC tech and
have them check it out and perform any needed maintenance. The advantage is
they are far more likely to spot a potential problem or safety issue than
you would be doing the maintenance. The only trick is to find a good one.
Ask neighbors and friends. Good Luck

--
Joseph Meehan

Dia duit