No, this is not a "normal" set up. Let me ask this question; do you get heat from the overhead vents when the heat is on? If not then it isn't going to hurt anything for that fan to run but it probably isn't going to help much either. AC requires really good airflow while heat is less dependent on good airflow. You could run the AC with the fan in the ON position and the compressor would cycle and fan would keep the air moving in the home helping to keep it cooler and the air "mixed". With the furnace you need to have the fan set to AUTO, this is because the heat exchanger in a gas unit needs to heat up to a certain temperature prior to engaging the fan so that it does not blow cold air on you. Secondly the gas will shut off when the thermostat is satisfied but the heat exchanger needs to cool to a certain temperature before the fan shuts off. Not the same for electric heat.
CMunrock wrote:
My fifth wheel has two temp controllers. One has a digital display that controls my A/C and blower. This thermostat also controls my gas furnace.
THe other thermostat is the type that I've had on other RVs, with the manual slider on the top.
In order for my furnace to run, I have to put the digital thermostat on the 'heat' setting. The fan blows air thru the overhead ducts at the same time that the furnace fan blows warm air thru the floor vents and wall vents. Is this a normal setup?
I'm asking because both systems are pretty noisy and when I want to run the furnace, I don't want or need to run the overhead system fan, but it doesn't seem possible for me to run only the heating system fan.
Hope this makes sense. I'm accustomed to sliding the manual thermostat to the desired temp, and waiting for the furnace and fan to kick on and then shut off once the temp is reached. The overhead fan seems unnecessary and makes additional noise.
