I bought a Fiesta zero in 2006. Except that I moved to town, and car without air conditioning is a oven moving. I bought a kit, air conditioning for the Fiesta, Ford's all original. Sent to install. And from there my troubles began. In the beginning a wonderful, freezing like Siberia, but the electrical problems have started in the third month, the sensor voltage burned and from there when I turned on the air on and off, the engine was accelerated to rotation of 3000 rpm, and normal it is a thousand. I've got to turn the car off and wait a little while pro engine back to normal. The windshield wipers, turn on when connected with the air are too slow, it seems that there is no current and I got to call for maximum power so clean the windshield of the rain. The panel lights are low, and only return to normal brightness after turning off the air conditioning, not to mention that out of nowhere sometimes came at high speed on the road and the car goes out of nothing. All these problems have been after I installed the air conditioning. Because so far removed from that Ford ran straight, I went quiet. Can anyone help me? Fiesta Hatch 2006 Rocam Motor Zetec 8v 1.0, With Locking / Alarm / Air. 75 amp alternator, 45 amp battery. Grateful.