A/C never shuts off?
#1
07-13-14, 06:37 AM
A/C never shuts off?
I have a tanning salon with 2 separate a/c units and furnaces. Last fall both a/c units were replaced with carrier units. They look to be like basic residential units. At the time they were replaced I had non programmable thermostats for both units. It was fall so I never really used the a/c more than to just make sure they were blowing cold. Over the winter I installed 2 basic Honeywell programmable thermostats and they worked great all winter.
I have noticed since I started using the A/C it has never shut off. They both just keep running. It doesn't mater where I set the temp, or what fan setting I put on, it just keeps running. The only way they stop blowing is if I turn the a/c switch off. If it is 85 deg outside and I set the temp to 78 deg it will get to 70 deg or lower in the salon. On top of that the tanning beds are running all day witch is like having a bunch heater on all day long. I'm not sure if I should call the a/c guy of if I did something wrong when I install the thermostats. I have the fan setting on auto. Is there anything I could have done wrong when installing the thermostats that would cause this?
I have noticed since I started using the A/C it has never shut off. They both just keep running. It doesn't mater where I set the temp, or what fan setting I put on, it just keeps running. The only way they stop blowing is if I turn the a/c switch off. If it is 85 deg outside and I set the temp to 78 deg it will get to 70 deg or lower in the salon. On top of that the tanning beds are running all day witch is like having a bunch heater on all day long. I'm not sure if I should call the a/c guy of if I did something wrong when I install the thermostats. I have the fan setting on auto. Is there anything I could have done wrong when installing the thermostats that would cause this?
#4
07-13-14, 08:58 AM
Forum Topic Moderator
It sounds like you have a thermostat issue if the unit turns off when you turn the stat off.
Post the model number of your stats and the wire connections. I'd say that you have incorrectly wired or configured stats.
Do you have the O terminal in use?
Post the model number of your stats and the wire connections. I'd say that you have incorrectly wired or configured stats.
Do you have the O terminal in use?
#5
07-13-14, 12:03 PM
Both thermostats are Honeywell RTH2410b1001. There are 4 wires going to the thermostat. I matched all the colors. The only one I was not sure about was the blue wire. t stat has O/B. there is a jumper on the back of the display and it is closer to the O. Do I need to move it closer to the B?
#6
07-13-14, 12:29 PM
Forum Topic Moderator
It is unlikely that the O or B terminal should be used.
99% chance that your blue wire goes to Y if you are only using 4 wires.
Take a look at the connections at the furnace and post what you see.
99% chance that your blue wire goes to Y if you are only using 4 wires.
Take a look at the connections at the furnace and post what you see.
#7
07-18-14, 07:51 AM
I think you are right. at the furnace side there is b g r w wires, but the blue wire is going to the Y terminal. I am guessing I should move the blue wire at the thermostat to the yellow terminal?
