I have an early model 2004 RX330 (built in 2003) - No Nav system. I replaced the radio a few months back. I am now having air conditioning/heater issues. I have to keep the A/C setting to LO to get cold air. The air isn't cold until the car is moving. When I stop moving the A/C no longer is cold. The issue on the other end is the heater. Hot air is not supplied until the temperature setting is 85 of greater. It used to work great. The store I purchased the radio from said that a resistor jumper was needed if my car had a Nav and appropriate wiring harness. My radio wiring harness doesn't need a jumper and should work properly. Wrong! Any help in fixing my climate control appreciated.