The heater valve and pump are attached to the firewall on the driver's side. The combined unit makes a noticeable whinning/whirring sound, so I'm sure it's either sticking or slowing down, but I can't tell if its the valve or the pump that needs service/replacement.
How can I troubleshoot it to determine the problem?
have the same problem?
Friday, September 11th, 2009 AT 1:31 PM