I have a 2000 Beaver Marquis, My AC unit was mgf. by SCS (Specific Climate Systems) Frigette (model # R-VAC 2702) who are now out of business. The Co was bought out but the new Co. did not buy the A/C business. Don't know where their parts/assets went to. My problem is, is that the fan that blows cool air through the exchanger to the coach air ducts will not come on when the system is in Low Cool Mode. Tried changing the fan control on the thermostat from Auto to Manual Lo then to High, still no fan control. However, when I switch the A/C mode to High Cool Mode, the air duct fan will come on and run, but this only happens after the second compressor kicks on. Both compressors and the condenser cooling fan are OK. Need schematics/source for parts if available like thermostats and control boards etc. Thanks, fultimn.