Hi all,
Noobie here - so please forgive basic ?'s.

My Lennox Air conditioner will not turn on. When I switch the thermostat to cool and fan to on nothing happens. Can anyone suggest how to begin to diagnose the problem?

Is there anything, such as a switch located in the furnace area that would "switch" the air conditioner off. We had a furnace guy in to check out our faulty lennox furnace, and I seem to remember him saying "well, we don't that, so lets switch it off". I do not remember what he was referring to though as it was last winter.

Amy assistance would be appreciated.

Cheers
Greg