Boy where do I start. My RR started over heating several months ago. Took into the shop and they replaced the Radiator. next time replaced the Thermostat, over heated again then they rebuilt my engine. It worked good for about a month then it over heated again. Took it back tot shop. Thermostat was stuck. ran a Pressure amd Combustion check on the cooling system it failed. Added Steel Seal. Ran Test again and Passed... took it out for a test drive drove 15 miles over heated. Brought it back to shop. Reflushed system found small "white residue" in thermostat flushed the entire system again.. (didn't know what caused the white residue) The additive ???? Took it out again today drove it for an hour didnt over heat but the heater blew Cold air.. What is the problem?

PS: the work is under extended warranty so I am not paying for it. But I can't drive my Car !!

RRDude