Unable to run A/C in fan only

[moisha]

I have Lennox central A/C unit with electric heater and I cannot run it in fan-only mode. When I turn on the fan, the outside unit turns on as well - the wires must be connected wrong...

[paul52446m]

I have Lennox central A/C unit with electric heater and I cannot run it in fan-only mode. When I turn on the fan, the outside unit turns on as well - the wires must be connected wrong...

How many wires going to the stat and what post are they on.
Also these same wires are on what post at the unit. I think you are saying you
have a air handler with a air coil and electric heat?? Paul

[brettyg]

It could be that the two wires are shorted out in the wayy. Go to furnace and disconnect all the low coltage wiring to board with the power off. Put a jumper fom r to y and see fit he ac comes on then.