Air conditioners are powered by electricity, which means they have many different controls and components that ensure every part of the system turns on and off at the right times. Try gently tapping it with something to see if it starts working properly again. Rub the emery paper or burnishing tool back and forth several times until the contacts are clean. Without a circuit diagram I can't say for sure, however I suspect that the part with the OMRON label in your third picture is the fan relay. The compressor is the unit that cools the air before it enters into the Honda's cabin. Perhaps my relay was defective? The motor would be stuck in its starting mode and draw high amps. You are driving your RV under the scorching sun and suddenly realize that the interior has turned into an oven. Stuck compressor generally refers to a compressor that is simply stuck and won't start. Insert the emery paper between the contacts to be cleaned. Go to the thermostat and turn the indoor temperature setting up a few degrees higher to see if the fan turns off. Turn off the equipment you are working on to avoid electric shock. Do you think your air conditioner contactor might be bad? If you believe that the AC's not working or … After founding a small telecommunications engineering corporation and visiting 37 countries, Asmus studied broadcasting at Arizona State University and earned his Master of Fine Arts at Brooklyn College in New York. In this case, the start capacitor would never be taken out of the circuit. 1 Answer. My problem is, when I test the relay using an LED everything works fine but when I use the 6 D batteries (9volts approx) the relay seems to be sticking. If you can't get to the contacts, you can't clean them. Make sure they check everything relating to the non-operating compressor. Sticking relay contacts can be cleaned with a burnishing tool or with fine grit emery paper, if you can get to them. This way I knew that the solenoid would be getting 120 volts whenever the air conditioner was turned on. If there is an air conditioner, remove the screws to the control panel and pull it off. Call a repair professional if this fails. Be sure you have an RV tech replace the board if it needs to be done. Problem: Fan on your furnace runs all the time and will not shut off. If your AC is not properly cooling the vehicle, the AC clutch relay could be faulty. But, ONE relay is apparently stuck since even though the red LED is off, the LED strip section that it controls is still on. 0. If not, and the blower is running, again, that means the relay is stuck. The thermostat wiring could have come loose or damaged or the many circuit board of the thermostat may have burned up. Just get a toggle switch. This may be true of the fully automatic systems as well. Compare the new relay to the old one. You may need to replace the thermostat or check the wiring. The relay in your car or light truck's air conditioning system controls the compressor. Rub it slightly to remove any grease or dirt. It operates just like any other relay, and is often controlled by a button labeled ‘A/C’. Never try to clean relay contacts on equipment that is turned on. Do you have the same question? Until an HVAC repair technician arrives, turn off all power to the air conditioner unit to prevent damages to the air conditioner. Turn off the equipment you are working on to avoid electric shock. Air Conditioner Circuit Board Troubleshooting Question - Hello, my name is Calvin and I am an HVAC Technician that graduated from a community college 2 years ago and I am still learning and know I have much more to learn before I think of myself as an expert. You can test the clutch relay for power with a test light. stuck fan relay or a bad sequencer. If the condenser is dirty or clogged, it can cause the air conditioner to run constantly. It operates just like any other relay, and is often controlled by a button labeled ‘A/C’. Classroom is the educational resource for people of all ages. Step 1: Locate the relay. In Angie's List > Project Cost Info; Report It Tweet. The side of the unit connected to the wires is where the AC’s control panel is. The air conditioner (A/C) relay, is a relay used to send electrical power to the air conditioning compressor, and air conditioning compressor clutch when the system is turned on. With the power disconnected, I checked the fan to … If something goes wrong with any of your air conditioner's electrical components, your system will almost certainly experience performance problems, if it even turns on at all. WHY ISN'T MY AIR CONDITIONER BLOWING COLD AIR? You should also check the air conditioner in the engine bay to see if the compressor is running. Testing the relay requires the use of an automotive circuit tester because many of today's computer-controlled cars and trucks use the computer to turn the relay off and on. All of that AC system is run by the computer. Start with the easy fixes. How can you unstick an air conditioner/ heating unit fan relay if it is stuck? Lack of Refrigerant– Your Outlander’s air conditioner will not work if the refrigerant has disappeared due to a leak. AC not working or cooling? Symptoms of Wear or Failure of the A/C Relay . … After gaining access to the air conditioner (details below), I unplugged the solenoid power lead from the relay and piggy-backed it onto the power lead for the compressor motor. Then, locate the PCM power relay and determine which wire leads to what part of the terminal and the function of each wire. Since you don’t want the air conditioner to fail during the hottest months of the year, pay attention to these symptoms of a bad AC contactor: 1. 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