Question about Heating & Cooling
If you are not comfortable working around High Voltage, do not attempt to fix anything. At your own risk, there will be two small wires going to your outside unit and one set of larger wires. The larger set powers the unit with High Voltage. Leave them alone. The smaller wires carry Low Voltage and energize the control on the condenser. If your thermostat is not sending a signal, these two small wires will not have any voltage running thru them. Check for 24 volts when the thermostat is calling for Cool. For a quick test, jump out the terminals where the two wires connect and see if the outside unit starts. If not, you have issues that will require a technician. If it does start, check the wires for any breaks or bare spots and replace if you can. Check the thermostat and make sure it is in fact calling for Cool. Replace any batteries in it or jump out the same two wires at the thermostat and see if it starts. You may need to replace the thermostat if it does start.
Posted on Jul 31, 2008
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Posted on Jan 02, 2017
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