Okay, tried in electrical, but since this is the Heating/Cooling forum, I figured that this might be a good place to post as well. First the backstory:
I hired a neighborhood kid to mow and weedwack my lawn. Saved me a couple of hours, and put some money in his pocket. Well later that day my wife came to me and said the Furnace was running, but the temperature inside the house was increasing (not a good thing for Houston summers). I went out to the compressor, and found that the 18/2 thermostat wire was apparently sliced by the weedwacker. I spliced it back together as a temporary fix (after stripping about 20 ft of pre-existing electrical tape and finding a previous splice from a different owner), then proceeded to Lowes for the proper items to replace the wire.
My first mistake (if you don't count hiring the kid for weedwacking), I bought 12/2 metal clad to replace the 18/2. I figured the metal clad would protect the wire from future weedwacking attacks, but didn't factor in the change in resistance. Ran the existing 18/2 wire to a newly installed outside J-box, spliced the wires together, and then turned back on the system. Worked great for about 4 hours... then the circuit breaker tripped.
Since then, I went back and replaced the 12/2 with 18/2, and am running it through a plastic hose from the J-box to the unit (the connections are watertight, with gaskets). When I turn back on the circuit breaker the fan blade spins, then I turn back on the thermostat, and the circuit breaker trips. I am at a loss...
Now the 18/2 wire is spliced to a yellow and brown wire set that runs to the control board in the compressor. I am 99.9% sure I wired it the correct way, but if someone could confirm for me which wire (white or red) connects to the yellow and which connects to the brown, I would apprecaite it. I cannot think of anything else that is causing the trip. As always thanks for the help in advance.
Never tear down a fence until you full understand why it was put up in the first place- An old Texas farmer, author long gone and unknown but his words remain - Houston, TX