Following this procedure will eliminate the risk of errors in
reconnecting the module which can lead to heater
malfunction.
1. Close all fuel supply valves to the heater and
disconnect the heater from its electrical supply.
2. Open the control box door (if applicable).
ATTENTION
Do not immediately begin to disconnect the electrical leads
from the control module unless you are familiar with the
control module’s wiring designators and associated color
code of wiring.
3. Position the replacement module near the module in
the control box.
4. Transfer the electrical leads one at a time from one
module to the other by matching up the wiring
designators until all leads are reconnected to the
proper designator on the replacement module.
5. Remove the mounting screws that secure the module
to the control box.
6. Mount the replacement module in the control box
using these screws and tighten securely.
7. Reconnect the heater to its electrical supply and open
the fuel supply valves to the heater.
8. Start the heater and check for proper operation.
August 1999
8.2-1
1
Servicing
Instructions
Ignition Control Module Change-Out
