My van has been to the shop several times in the last six weeks for the same problem. The heater blows cold air when idleing. The engine is hot, Heater hoses are hot also. Several thermostats later I decided to work on it myself. After rerouting the hoses and checking the valve I disconnected the hoses and ran two clear hoses into a bucket of coolant. The coolant only flows when the engine is running at a high rpm. Is the water pump supposed to circulate at an idle???
- posted
18 years ago