Another issue we had this past weekend with our 'new to us' 2019 Southwind 35K, there was no heat coming from the heater controls on the engine.  It was also a very cool/cold weekend!  We have the V10 engine and there was zero heat, fan worked fine, A/C appeared to work fine.  Thanks

Graeme

Thankfully I found the control had been disconnected, reconnected and now have heat, thank goodness as it is now below freezing around here.  I understand there is some concern that this valve allows warm air to circulate even when on A/C, will have to check.  There is not as much heat output as I would have expected from such a large engine however, less than our Jeep.