Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is***** heater core is behind dash so not something you can easily access. Considering one heater hose is hot and other is warm usually means the heater core is clogged. You will want to disconnect both of the heater hoses and use a garden hose to flush it out from both directions which will usually solve the problem. If problem was programmer then mix door wouldn't move and heater hoses would both be hot. Let me know how it goes or if you have more questions, thanks.