HELP! Over one week of troubleshooting and ac still not fixed. When thermostat fan turned to "auto" the blower comes on for a split second but then the safety switch (3 amp) is tripped and blower shuts off. The blower works fine in Manual mode.

What kind of thermostat do you have?

What kind of thermostat do you have?

Honeywell

Is it the kind that needs a battery or the kind that draws current from the heater?

It draws current from heater