Must the battery be disconnected before installing the EED?

Yes.  Sensitive Electronic Components can be easily damaged by not disconnecting the battery.  Damage caused by failing to disconnect the battery will void the manufacturer’s warranty.

Will the EED-5 work on positive and negative switched electrical systems?

Yes.  The EED-5 is designed to work on either system type.

How do I know if the EED-5 is operating?

After completely installing the EED-5 and reconnecting the battery, the EED-5 will enter a self-test mode that activates the blower motor.  This self-test occurs even if the temperature is below 60^o F.

Can longer wires be spliced onto the EED-5?

Yes.  You must use manufacturer approved connectors that are included with the EED-5.  If the installation requires an additional length of wire to complete the installation you must use approved wires and connectors.  Your parts department should have access to approved wire and connectors.

Can the EED-5 be installed in the engine compartment?

Yes.  The preferred location for installation is inside the vehicle, behind the glove compartment, where it will be protected from the engine compartment environment. When installing the EED-5 under the hood, avoid locations subject to high heat and water accumulation.  Place the EED-5 so that water will not collect in the unit.

What is auxiliary key power?

Auxiliary key power means a wire or circuit that has power when the ignition key switch is turned to a position that allows power to flow through the circuit.

What is constant "ON" power?
Constant power is a circuit that always has 12 volts in the wire. There is no switch to control voltage between the battery and this portion of the circuit.

Will the EED-5 cause a DTC to set? (Diagnostic Trouble Code?)

No.  The vehicle’s computer does not recognize the presence of the EED-5.

Where do I find the wires to connect the EED-5?

Locate the blower motor and the plug or wiring harness connected to it.  Review the wiring circuit diagram on the EED-5 instructions to identify the gauge and color of the wires that the EED5 needs to be spliced into.

Why, when the EED-5 activates, does another electrical appliance in the car turn on?

On some GM cars with multiplexing circuits, it is possible to activate the radio when the EED-5 shuts off the power to the fan.  This happens due to an electrical spike generated by the blower motor as it spins down.  The fix for this problem is to install the GM Relay Kit, part number #88880045.  Check the AirSept (www.airsept.com) web site for special installation instructions for this relay.

What vehicles will the EED-5 work on?

Any 12 volt DC vehicle manufactured without an “afterblow” module and most automatic temperature control (ATC) systems.

What vehicles will the EED-5 not work on? (Military/commercial vehicles with 24v systems and aviation units)

The EED-5 is designed for and manufactured with 12-volt DC components.  It has never been tested or validated for any other voltage or current type.

What happens if the power leads are hooked up backwards?

The transistors can be damaged and the unit will not function properly.  Improper installation will void the manufacturer warranty.

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What can cause a fuse on the EED-5 to blow?

Either a short circuit or connecting the wires incorrectly can cause a fuse to blow.

Will the blower motor operate if the EED-5 fails?

Yes, the blower motor will operate normally if the EED-5 fails.

Will the EED-5 cause the battery to go dead?

No. The EED-5 has special monitoring circuitry that prevents blower motor operation if battery power is below 12.5 volts or if the temperature is below 60° F (12° C).  The unique pulsed operating pattern minimizes power usage when operating the blower motor to dry the evaporator.

When an EED-5 is installed, must Cooling Coil Coating be used to control odor?

Yes.  The EED-5 eliminates the collection of moisture on the evaporator core.  The EED-5 will not remove the odor that existing microbes have developed. This odor will remain in the vehicle until treated with Cooling Coil Coating.

The EED-5 stopped working, what do I need to check?

      a. Verify that the blower motor is operating at the high speed or max blower setting. 
          If no, repair this problem first then go to step “e”.
          If yes, follow steps b through e.

      b. Check both fuses in the EED-5.  Replace as necessary.

      c. Check all wiring connections and splices.  Repair as necessary.

      d. Verify the DC power level at the main power connection for the EED-5.
          If power is below 12.5 volts DC repair this problem first then go to step “e”.
          If power is 12.5 volts DC or greater proceed to step “e”.

      e. Disconnect the battery for 2 minutes then reconnect it.  Approximately 30 seconds after the battery is connected
          the blower motor will run on high speed for two (2) seconds.  This will occur three (3) times.  On some negative
          switched vehicles the fan will blow for 30 seconds before test sequence begins.

If the test sequence operates normally, reinstall all removed parts and release the vehicle.

If the test sequence does not operate, replace the EED-5 following the installation instructions.