Central A/C problem-won't shut off
Our A/C is on and running and when it gets to it's desired temp the outside unit is not turning off. Even when I move the setting on the thermostat from COOL to OFF the outside unit continues to run.
Last night we left the A/C on (82 and humid outside) and in the morning the temp outside had dropped and the outside unit had some frost on the pipes and was running even though the temp inside was below the desired setting.
We shut off the outside unit at the circuit breaker and waited until all the frost had melted. Later I turned on the A/C again (it's high 80's and humid outside now) and the outside unit runs and runs even though it's getting really chilled in the house.
Just looking for suggestions as to what to look for. It's a digital thermostat and the A/C system is about 15 years old. I figure I'll need a pro, I'd just like to know what to expect.
Our A/C is on and running and when it gets to it's desired temp the outside unit is not turning off. Even when I move the setting on the thermostat from COOL to OFF the outside unit continues to run.
Last night we left the A/C on (82 and humid outside) and in the morning the temp outside had dropped and the outside unit had some frost on the pipes and was running even though the temp inside was below the desired setting.
We shut off the outside unit at the circuit breaker and waited until all the frost had melted. Later I turned on the A/C again (it's high 80's and humid outside now) and the outside unit runs and runs even though it's getting really chilled in the house.
Just looking for suggestions as to what to look for. It's a digital thermostat and the A/C system is about 15 years old. I figure I'll need a pro, I'd just like to know what to expect.