Ducted Air conditioning - No Power
My air conditioning recently stopped working. There is no power running to the wall switch but the fuses at the power board to the house are fine. The furnace is in a closed area without access so I haven't been able to check the control board without cutting a hole through the plaster wall. Before I do this, does anyone have any ideas?
I've checked all switch connections with a circuit tester just to make sure that there was no power.
Another question, does the mains power run into the control board on the furnace before running to the switch, hence no power?
Thanks in advance for any replies.