my heater controls all work properly, blows hot. but when i turn the heat on my air conditioning pump turn on for 2 seconds then cuts out for 3 seconds then back on for 2 seconds then off for 3 seconds, does it all the time and i hate it. Even when i put the air conditioning on full blast it does the same damn thing, on for 2 seconds off for 3 seconds on for 2 seconds off for 3 seconds. every time it engages for the 2 seconds it is on my idle drops abouts 100rpms which i think is normal because the drive accessories are working harder but i need help here. how do i fix it so it operates properly.