The hot water control valve may develop a coolant leak resulting in engine overheating. A leaking valve should be replaced.
Car Problem Reports
Cadillac Catera Hot Water Control Valves May Leak
Cadillac Catera Problem
Average Mileage: 111,900 mi (62,500 mi - 150,000 mi)
i need to replace it, with new
Visitor, 1998 Cadillac Catera, 125,000 mi
Heater Control Valve leak,
Visitor, 1998 Cadillac Catera, 102,000 mi
Yes, I have a water control valve leak as well. also I have a faulty EBCM. help
Visitor, 2000 Cadillac Catera, 150,000 mi
Heater control valve on back of motor is leaking. Working on fixing it.