Have had the following system running for a few months now.
Carrier 58MVC060100- 3 stage
Bryant HP 286ANA048
Evolution TStat, Version CESR131331-14
Have a few questions. During snowstorm here in PA, HP showed system fault code 56- Temp Sensor out of Range, 3 times. System was showing coil temp of 0 and running the aux furnace even though outside temp rose to around 34+. ( my lockouts are >35 and<32) Since that time HP seems to go straight to high heat. I have not seen the system run at low. I have run the system check on HP and it appears to operate fine on both low and high. But again, just as an observation HP does not seem to start on low and ramp up to high. It has been going right to high speed when heat is called. What could be going on, any way to check if there is really a problem? (Today is approx 20* so I cant do much)
Second question. Have just realized that the Tstat does not have any indication for the 3 speed furnace. Run time counter only shows Low and High. Is the system taking advantage of all three speeds of the furnace. Is there a way to verify?
3rd issue. Fault history shows code 12, blower on after power up, 7 times. Has occurred randomly over several months. What does it mean and is it any thing to worry about.
Installer is very busy and I cant really wait around for his service call unless absolutely necessary, so I would just like to get an idea before contacting him.
Thanks in advance for any guidance.