I have a Carrier unit the keeps blowing the fuse on the circuit board it's a 5 amp fuse. I replaced the thermostat wire and it still blows as soon as try to trun the system on?

I have a Carrier unit the keeps blowing the fuse on the circuit board its a 5 amp fuse. I replaced the thermostat wire and it still blows as soon as try to trun the system on?

Check for a short somewhere in the 24 volt circuits