Check the heater hoses for a manual shut off valve or two .
Many owners install them to make sure there is no heat in the dash while the A/C is operating.
BTW: I just replaced the compressor and the condenser electric fan on my F/L chassis and F/L had installed shut off taps in the heater hoses beside the transmission , so if the heater hoses aren't flowing from the engine , you have to look everywhere.
EDIT : If you could add some more info on your ; new to you coach ; year , engine , chassis , you may get more help.
Your profile still says Monaco.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
|