How many zones do you have ?
Thank you...are you familiar with the inside of the mini zone control box?
yes, i have it open now.
You will have a set of wires going to the furnace...rc, y, g, w etc....do you see the Rc and G?
and if so take a paper clip shaped in a U and touch one end to Rc and one end to G at the same time..5 seconds...tell me if fan starts in furnace.
there will be a transformer mounted somewhere with a 2 wire strand going to minzone.
Depending on model of minizone the 2 wires will go to Terminal 1 and Terminal 2....do you see those?
Do you have a meter to tell if the 2 wires have 24v present?
Which model number minizone and I will see if we can proceed via another venue.
Well that changes things....
Is the exhaust fan running on the furnace?
Ok...mini zone ok.....issue is with the exhaust fan motor in the top attached to vent pipe. Now the issue is exhaust motor getting power but not running......OR.....is the motor not getting 120v. It is down to board or draft motor.
That is a new one for me......have you had this unit for long?
In this particular case I would remove. The fuse is redundant anyway. I am wondering if the circuit board was damaged by condensation, or had a non stop inducer...something that would make someone remove the fuse for a reason.
I would bypass right now for further testing.. You can put back in the loop if need be later. Leave a couple inches of lead.
The missing piece is still the exhaust fan running.....when the led blinks steady fast, it is a call for heat which means exhaust fan should be running.....the 3 blink is air switch failure to close.......which is because the exhaust fan did not start.
Get meter and verify 120v to motor...and then get model number and I can tell you where to get motor