My air was working fine. But I when came home the other day nothing was blowing through the vents. And the pipes to the ac were frozen. All the filters were clean in the furnace and in the ac. We checked all the breakers in the house and shut everything off and turned it on again including the switch on the back of the furnace. The ac unit its self is running fine so is the furnace but still nothing is blowing through the vents. If any body can tell me what is wrong with it and how to fix it that would be great.

Check to see if the indoor fan is running. Is the filter installed in the proper direction? If no to either of these, air cannot move through the coil and threrfore freezing up

How can I inspect the coils to see if they are freezing up?

Thanks, gblair