A/C, Furnace, Thermostat operation

[cpike4563]

I'm new to the Grand Design and Fifth Wheel world. Purchased a Reflection 303RLS a few weeks ago and still learning my way around it. This model has two A/C's and two thermostats.

I find the A/C is great but when the Furnace is running the A/C also is coming on and blowing. Is this normal operation? Could I have a simple Thermostat issue?
Can anyone offer an explanation of what I should expect in Furnace mode?

Thanks for your feedback.

[FT4NOW]

Welcome to the forum. Are both thermostats on? Typically, only 1 thermostat controls the furnace, usually the one in main area. The other thermostat should be set to off.

[huntr70]

You need to put your fan setting to "auto". Then the fan shouldn't run when the heat is on.

[cpike4563]

The Auto setting took care of it. Thank you.

[masterdrago]

Our new 2600RB does the same thing on fan high setting when we run the heat. Our last Montana 3791RD did the same. I just always assumed it was to help circulate warm air near the ceiling whenever the heat was running. The a/c compressor never comes on during heat request.