I have a coleman electric furnace/ac the blower will not shut off. I disconnected the thermostat and changed the sequencer and it still keeps running. The ac compresser comes on and off when cooling is needed but the blower keeps running.

Most thermostats had a setting for the fan.. ON or AUTO. If its set to ON, then it will stay on.. try switching to AUTO?

Just an idea.

Check to see if the unit has a fan blower relay. They will sometimes stick in the on position. If that is the case it will have to be replaced.