Heat Vents- not sure what is happening

[sandstuv]

We have a 2018 Cardinal 3250 RLX 5th wheel. We have 2 Dometic thermostats, one in the living room and one in the Bedroom. When we set the living room thermostat for heat, heat comes out of the floor vents in both the living room and the bedroom. When we set the Bedroom for Heat, no heat is blowing out of the floor vents. Is the heat in the bedroom supposed to blow out of the floor vents? Or the Ceiling vents?

Thanks
San & Rob

[Kimber45]

floor vents are for heat/ celing vents are for AC

[sandstuv]

In the bedroom when we turn on the thermostat to furnace it blows cool air out of the AC vents on the ceiling

[5picker]

Originally Posted by Kimber45

floor vents are for heat/ celing vents are for AC

Not always.

Floor vents are for the furnace, granted.

Ceiling vents are for the A/C... and... if you have a heat pump and/or a heat strip option in your A/C, they will blow semi-heated air out the ceiling vents. (usually not hot but warm(er))

Do you have two furnaces?
I'd suspect not (but some R/Vs do) and if not I'd bet when you select heat for the bedroom it is a heat pump/heat strip option in that A/C unit so the heat will only blow out the ceiling vents. Do you have either of these options? Also some bedroom thermostats have a heat mode but nothing (the options I mentioned above) is hooked to it except the fan when in heat mode. (see below) They typically use the same thermostat whether you do or don't.

I'll throw something else in the mix... some Dometic controlled units have an option to use the A/C fan to distribute the interior air throughout the rig. (warm air rises) With the fan setting in the thermostat on anything except AUTO (AU) the A/C's blower fan will run when using the furnace. (but not the compressor)

You can use this feature by setting the fan to High or Low at the thermostat. You can disable it by setting the thermostat fan setting to AUTO. (AU)

[Bama Rambler]

I don't believe that RV has dual furnaces so the thermostat in the bedroom is A/C only even though it has a Heat mode. The reason it blows air out the A/C registers when in Heat mode is that you have the fan set to something besides Auto.

[sandstuv]

Not sure if we have 2 furnaces, most likely do not but we can check.

We will also check out everything you suggested and let you how it ends up. Our RV is currently in storage and will be taking it out again in March.

This is why I like to get feed back from the experts in the forum.

Thanks again!

[sandstuv]

OK, we didn't know that we had no heat control in the bedroom, we do have furnace vents on the floor, then that would that be controlled by the living room thermostat.

[Mr. Dan]

Originally Posted by Bama Rambler

I don't believe that RV has dual furnaces so the thermostat in the bedroom is A/C only even though it has a Heat mode. The reason it blows air out the A/C registers when in Heat mode is that you have the fan set to something besides Auto.

This is the way it works on my 2015 Wildcat.

[sandstuv]

Thanks the good information.

[loyda]

Originally Posted by sandstuv

We have a 2018 Cardinal 3250 RLX 5th wheel. We have 2 Dometic thermostats, one in the living room and one in the Bedroom. When we set the living room thermostat for heat, heat comes out of the floor vents in both the living room and the bedroom. When we set the Bedroom for Heat, no heat is blowing out of the floor vents. Is the heat in the bedroom supposed to blow out of the floor vents? Or the Ceiling vents?

Thanks
San & Rob

Only living room runs gas furnace even if bedroom shows heat setting