It is most likely air trapped in the system from the coolant swap - this car traps air more than most. Pull the black cover for the bleed valve (remove dipstick, oil cap, coolant cap). Under this you will find the bleed valve. Lift the 'D' ring to open the valve and run the car for several miles. This process may need to be repeated.
To check fans, turn on AC - both fans should run automatically. If not, check fuses/relays. If only one fan is working, your ballast resistor is likely shot and need replacing.
