Husband weed wacked wire to central air unit(thermostat wire I think)?

Question

its a nordyne 10 seer standard efficiency split system central air unit model sqa-030ka with a coleman furnace and thermostat. we cut out the bad part of the wire and rewired it to the unit and won't work. furnace won't turn on. the inside or outside fan won't turn on. the circuit breakers in breaker box and on furnace are fine. can't find a reset switch or fuses. the wires are too small for inline fuse. you can here the furnace hum but won't kick on. the manual i recieved tells how to install it and thats all. the service numbers i have are for parts only.i can't find a service manual online anywhere. the website asks for a contractor password.please help. i don't have much money so i would like to try to fix it myself before i call a service man

Answer 1

If not a fuse, it might have burnt out your thermostat

Answer 2

haha, sucks for you

Answer 3

I work on specs for these kinds of things (I work with engineers).  Those thermostat wires can be tricky and delicate things, and once it gets reconnected, there will have to be a round of testing.  I suggest you call an HVAC repairperson PRONTO, before a heatwave comes along.

Answer 4

you only have two wires to chose from and this is very low voltage. There, try reattaching the wires again, making sure they both have a good metallic ocntact. You CANNOT get shocked from this, it's about 12 volts, tops. If it doesn't work, and you've checked the thermostat to make sure you have it in the correct position, redo the wires and try again. This is a coomon thing with weed eater and generally no big deal. Keep trying, make sure you remove enough of the wire insulation, that plastic stuff so that you have good connections,

Answer 5

My nephew did this to my sisters AC last weekend. In her case it was a small purple fuse, 3 amp (the type you would find in a automobile) that had blown. It was located in the furnace section (as described by Ron R) on a white control board.^

Answer 6

if you end up messing it up worse, then you'll regret not calling a repairman.

If you rewired it wrong, trying to get it to work might end up burning something out, meaning that the whole thing might need to be replace, a LOT more than getting a repairman at this point.

Answer 7

You blew the 24v Control fuse inside the furnace.  My guess is that the furnace function wont work, in addition to the airconditioning, because the thermostat has no power to "tell the furnace to come on".  I know that on my Trane air handler, the fuse is inside the cabinet, above the air conditioning "a-Coil" and above the blower.  On a furnace, it is going to be in the compartment of the furnace where the gas valve and controls are located.  Worst case scenario, you may have fried the control board if the wires were shorted out for long enough.  You may have to call a heating and cooling tech out, but this isnt really that big of a problem, should be a minimal charge.