[dragz]

This morning it worked fined but now
I get the 4 flash code which means limit switch open
I tried turning off all the power and back on still the same
Every time I I set thermostat to a temp I hear two instant clicks then the blower turns on immediately and the igniter does not even try to light
If I set temp under 70 degrees the blower eventually goes off but anything higher than that and it runs forever blowing cold air
I am renting the house I'm in so don't want to mess with it too much just looking for quick fix till I get someone to check it

Also I tried pushing the reset buttons on the limits but on one of them the button is stuck I think it's the roll switch, I can't push it in its too hard
And I don't want to open blower panel to push the main limit switch reset because I don't know how
Any ideas?

[hvac1000]

If resets are your problem resetting them is the only option to get the furnace running again.

IF you have any of your registers closed or if the furnace filter is dirty this will also cause the limits to trip.

[coldinharbor]

If you have a ohm meter you can check for continuity on the roll out or limit switch you think is not resetting.
If that is in fact the case it'll have to be replaced before your furnace will light again.
If you don't have a meter you can jump or bridge the two wires connected to it and see if your still getting the same code.
This is just to check the switch not to bypass a safety feature that is required to protect you from a major fire. Always replace the defective part before returning the furnace to operation.
Good luck and I hope this helps, gary hazher