Mr. Mark wrote:

its chewing up alot of electricity (1000 kw/h per month).
should it be running constantly? if not, how can i turn it off? and
should it be using this much electricity?

SNIP Cross-Post
That must be a large blower (big furnace?). Approx 10 Amps (@ 120V).
Believeable though.
The thermostat may have a FAN switch which is set to "ON",
rather than AUTO.
OR...the FAN/LIMIT switch inside the furnace is stuck On.

If electrical troubleshooting isn't your field, get a service type in.

Jim