During the winter I replaced the thermostat in our house that controls
heating and cooling systems. I have split system with 5 wires coming
to the thermostat. When I was replacing the thermostat I accidentally
did short circuit and heard the air fan for AC on the attic going off
(this was the last time the AC worked).
All breakers are turned on, I have power coming into the coil outside
the house (at least to the breaker) and to the attic fan. There is a
switch on the fan and I have power coming through the switch all the
way to the motor.
From the thermostat there are 3 wires coming into the fan. As I
understand electricity the wires have no voltage and work as a switch
(short circuit turns it ON) and my accidental short circuit should not
cause any damage to the system. However, I can not get the fan or the
coil to work after replacing the thermostat. I even try to switch back
to the old one but no luck either.
How can I test the system and find out what's wrong. Could my short
circuit cause any damage?
Depends.. Are you posting from the ether world or this one?
I highly recommend that you have that serviced by a responsible
company Technician. Its a matter of pay me a little now or a lot later.
I am really getting tired of reading about Homeowner accidents with that
ticking time bomb that heats their homes. We have enough professional
hurt as it is.
The mistake you made was not shutting off the power
to the circuit before working on it - also probably
not tagging the wires as you removed them. Hopefully
all you damages is the A/C side of the thermostat.
I do all my own wiring and replacing a thermostat
is a DIY project. But unless you know how to test
the thermostat, it is time to call a professional.
BTW: I took the journeyman electrician's exam
years ago when I cam home from military service.
I *have* no ethics any more. I have been a perfect asshole for a long time.
Even though I am not in the HVAC trade I feel amongst my peers here for that
reason. I am (partially retired) in industrial machine and process controls,
so I understand the electical discussions here.
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