Evaporative coolers, also called swamp coolers and swampers, are cheaper to purchase and run than air conditioner units, but only function well in hot, dry climates. The motor in a swamp cooler turns a blower which moves air in from outside the cooler, through evaporative pads and out through a vent or ducting into the living area. The manufacturers of blower motors do not subscribe to a universal color code for their wiring, so making inquiries of the blower motor manufacturer's customer care personnel may be necessary.


Step 1

Determine that the motor is 120-volt if intended for use in a normal household scenario. Very often the manufacturer will print or emboss this information on the nameplate; if not, contact customer support personnel with the product code number from the plate and ask for the information. Also discover the exact color-coding functionality of the wires used for your swamp cooler motor.

Step 2

Observe the manufacturer's instructions for connecting the wires to the terminals. Motors for regular household use are available with either one or two speeds. A two-speed motor will typically be prefitted with four short wires which must be connected to the swamp cooler control circuit and the 120-volt circuit. Solder all connections and use a shrink-wrap insulation kit to seal the connections. Typically the color-coded connections should be made as explained in the following steps.

Step 3

Connect the green wire to the ground in the 120-volt circuit.

Step 4

Connect the red wire to the low fan speed in the control circuit.

Step 5

Connect the black wire to high fan speed in the 120-volt circuit.

Step 6

Connect the white wire to neutral in the 120-volt circuit.