I'm hoping someone here can help answer my question. Just bought a house with a Carrier Performance air conditioner and Carrier Infinity furnace with an Infinity thermostat. It also has a 3 speed blower motor.
The problem I'm having is when the AC comes on I can't get the fan to run on anything but low speed. I've confirmed that the blower can run at the faster speeds, just not with the AC on.
The only code that comes up is 56, which is a faulty outdoor temperature sensor. The outdoor temperature on the thermostat shows as hot as 200 degrees. I get conflicting info whether that prevents the fan from running anything other than low speed. I just bought a new one and will be installing it, but doubt that will fix the issue.
I've also read that this is how the system is designed, which if it is I'm changing it as on low speed the fan doesn't move the temperature inside the house. I haven't checked freon levels, but the air that does come out is cold.
Any ideas? One of my friends thinks that it is hardwired as such and I need to change it physically on the control board to make it work.
The problem I'm having is when the AC comes on I can't get the fan to run on anything but low speed. I've confirmed that the blower can run at the faster speeds, just not with the AC on.
The only code that comes up is 56, which is a faulty outdoor temperature sensor. The outdoor temperature on the thermostat shows as hot as 200 degrees. I get conflicting info whether that prevents the fan from running anything other than low speed. I just bought a new one and will be installing it, but doubt that will fix the issue.
I've also read that this is how the system is designed, which if it is I'm changing it as on low speed the fan doesn't move the temperature inside the house. I haven't checked freon levels, but the air that does come out is cold.
Any ideas? One of my friends thinks that it is hardwired as such and I need to change it physically on the control board to make it work.