my heater comes on but the blower for the house won't, it has 4 flashes stating unit open, what does that mean

Answer 1

The reason it signals open is for the limit switch! the blower motor has failed. The unit turns on, flame comes on no blower causes the high limit to open, causing this fail code. Need to replace your blower motor. A word of advise, if you have permitted this limit to trip for a while, it too will fail. These switches are a safe guard, not designed to be tripped a lot of times, especially in a short period of time. I would put a new high limit switch in as well, could save you some anguish later on

Answer 2

Is You Heater a gas heater? And what brand is it? On most gas heaters, central units have a door safety switch on it to turn power off to the unit. If your door is open you would not have power unless your door switch is stuck closed. Most times if your blower does not start a high limit switch will open and turn the furnace off for safety. I would have the blower motor checked or the board for problems.

Answer 3

it may either mean an "OPEN" wire or an OPEN cover or control box....if its the wire, itmeans you lost a leg ofyour wiring system, if its a cover or box, check to make sure all covers are closed and when in doubt shut all power off to unit and power it back up after 5 sec to see mit that fixes it...by resetting the unit

Answer 4

unit open sounds like a panel panel on your furnase is off, not on right or the switch to sense the presence of the doors is not functioning.

Answer 5

it means ur blower fazed out u need a new blower motor good luck

Answer 6

The cover may be miss aligned and not depressing the safety switch.

Answer 7

most manufacturers put a reference to the blinking light on the back of the upper panel on the furnace.