Terminal 1 is a blue wire and is the compressor circuit. If the circuit is completed, the light will illuminate. “ Using a 115-volt incandescent bulb, check from terminal 5 (white-common) to the other terminals to determine if a particular circuit is completed through the board. Instead, you need to unplug the 6-pin connector, or whatever size connector you may have, and then get a 115-volt incandescent bulb to do your test. The reasoning behind this instruction is that this device does not provide you with an accurate reading. One instruction was to NOT use the voltmeter to make any tests. You may have to go on the roof to do this work or pull the AC unit down and work on level ground. That access may depend on where your access doors are. Since the control board is inside the AC unit, you may have to get up on a ladder to access it. Once you open up that door, you will see a capacitor and some wires blocking your way to the control board.įrom there you can do your testing and removal if the controller is bad. It should be right behind the wiring diagram that is placed on the access door. In the case of the 5-button AC unit, the control board is located on the front right of the unit. That is due to the design of the different models of Dometic AC units. The location may be different from what we report here. Talk to your service department and see what they tell you. You can contact Dometic to see what they say and they may have a replacement part they can send you.
The replacement cost is going to be at $100 or well over $100 depending on the unit you need. They do as we will talk about other parts that are connected to this device as they may be the source or reason why your AC unit is not working. What we also know is that there are none to a minute amount of people who talk about troubleshooting this component. You just need to find the right outlet or marketplace that sells the one that is compatible with your Dometic AC model.
Replacing this part is not going to be difficult. One owner created a test box and when he added a thermostat to his system, he says it runs correctly, so the problem may not lie with the control box. That seems to be the only repair we have come across for this air conditioning component. That is if the control board is the problem and has failed in some way. You may find that any technician you contact will simply tell you to replace the unit.
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