Symptoms of a Bad or Failing AC Control Module, Signs of a Bad or Failing AC Compressor Relay, How to Troubleshoot a Broken Car Air Conditioner, Boxed end wrench or ratchet wrench set(s). By purchasing a service manual, you can determine where the sensor is located and the precise steps needed to replace this component. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. Workaround that avoids the replacement of the AC evaporator sensor from all Ford Fusions up to 2012. Looking the backside of the connector blue or green (wire side), the pins will be the third and fourth from left to the right on the up row. Not sure but I think you mean the temperature probe, sometimes called Evap Temperature sensor/switch? Step 2. When using AC on very cold days, the evaporator may ice, in this case you have only to shut the AC off and let the ventilation working. If you want to bypass it you will need to go right to the sensor connector or back on the wiring as far as you can go to the sensor and bypass there. The Bolt! Quick Fix (workaround) Ford Fusion AC Evap. Order A/C Evaporator Temperature Sensor for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Mounted on the evaporator core, this thermal sensor measures the temperature of the evaporator core constantly, and communicates the temperature back to the air conditioner control module. Fast, free online quotes for your car repair. thanks. Made with ♥ in Silicon Valley. Our certified mobile mechanics make house calls in over 2,000 U.S. cities. But heater blows ouside air temp, so I installed a DPDT switch so that in winter it will be hooked to evaporator senser and flip switch in summer to read through resistor. Evap Temp Sensor Moto… This entry was posted in … © It will also typically include removing the steering wheel from the assembly located underneath the floorboard. If there is not... evaporator temperature sensor replacement. It is possible that this could be related to your mass air flow sensor on your 2001 Honda Passport. It's commonly located on the passenger side on most cars, trucks, and SUV's. Disassembly of the glove box pressing it on both sides. Great information. Discussion Starter • #1 • Sep 29, 2016. Seems to be staying in place just fine for now. 7 months ago, I have a 2012 ford fusion SE with a blue connector. It is a part of the vehicle’s AC system, and as its name implies, detects and monitors the temperature of the AC system’s evaporator. On many of today's cars, the driver has the luxury of setting a desired temperature inside the vehicle through the air conditioning control panel. As far as I know, the so-called "evaporator thermostatic switch" isn't actually a switch; it a temperature sensor on the evaporator that's connected to the engine control module which, in turn, controls the operation of the AC compressor. There are three good youtube videos showing the dashboard disassembly.Shortest service time video: Longest service time video following Ford instructions (by the book): Workaroundon a similar vehicle (Lincoln MKZ): Did you make this project? If it does, you should shut the vehicle off and complete a diagnostic scan. Which wires pins should I use? Step 7: Perform a road test. On most domestic and foreign cars, trucks, and SUV's the AC condenser is located deep inside the vehicle's dashboard and behind the firewall. My pin layout doesnt have a 3rd wire, Question I have easy access to the connectors behind the glove box. These coils are inside your air conditioner unit. The exact steps for removing each of these components will be noted in the vehicle's service manual and should be followed exactly to ensure that other electrical or mechanical components are not damaged and are reinstalled correctly. The cycling switch or the evap. The evaporator temperature sensor tells the PCM or ECM the temperature of the evaporator and keeps the evaporator core from freezing .It is usually located inside the hvac case underneath the dash, mounted on the evaporator core. Step 11: Reinstall the support clip. The most popular service booked by readers of this article is Evaporator Temperature Sensor (Switch) Replacement. 1 year ago Worked perfectly, 2008 Fusion 2.3 fwd. My ac is now putting out 57 degrees and 43 on ac max. Thanks for all the info on the ac evaporator sensor problem. Following your service manual instructions, replace dashboard components in the exact order you removed them. The control module will determine if the evaporator core is too cool, too warm, or just right. Did the heat still work? The OBD-II code (P-0535) indicates that an Evaporator Temperature Sensor failure has occurred. AC temperature is inconsistent: On the lines of the warning sign above, inconsistent temperature is often an indicator that the sensor is starting to fail. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. Mechanic's Assistant: Have you checked the connectors on the sensor itself? I do not see why with manual controls I would have an issue with the heater or overworking the compressor. I installed a 37k ohm resistor between pins 13 and 14. Do the wires need to be cut going to the old sensor? Step 12: Replace all dashboard hardware, attachments, and electrical harnesses. Step 1: Determine the location of the sensor. (Any tips for dislodging the wires so I can more solidly connect the resistor wires legs to the wires would be appreciated. Am I missing something?Anyway, thanks for the info. Step 6: Remove the EVAP temperature sensor. Most sensors are screwed into the AC condenser and held onto the sensor by a secondary clip. There is no 3rd pin, Question When the switch fails or has issues, it hinders the performance of the AC system and even causes it to malfunction. As you can see by reading the steps above, once you gain access to the EVAP temperature sensor, the replacement job is really simple. The functionality of the A/C evaporator temperature sensor is crucial to the proper operation of your HVAC (Heating, Ventilation and Air Conditioning) system. Each vehicle that utilizes an EVAP temperature sensor has a unique location and process for replacing this component. A problem that Ford should take care in guarantee considering the poor quality of the sensor used and because it is a recurring problem on several v… Evaporator Temperature Sensor (Switch) Replacement Cost, The statements expressed above are only for informational purposes and should be independently verified. Set the temperature at the lowest possible temperature. Therefore, it is not cheap. Step 7: Remove electrical harness from the old EVAP temperature sensor. I can’t find a wiring diagram that identifies the two pins used by the sensor. I can't find the 37k resistor either. The factory shop manual states that this sensor monitors the evap temp. The EC light was on because of the evap sensor----wrong--the EC light was on because of 1241 low refrigerant level and the low refrigerant level produced a high evaporator temp which you thought was a bad sensor so you went out and wasted your money on a new sensor-----now you haven't solved the problem--- you have a leak--go to an AC shop have them evac the system and see if it will … The photo sensor is located at the right of defrost nozzle. Pay special attention to reattaching electrical harnesses in the correct position and to the right attachment. Need to replace evaporator temp sensor on 2011 f250. I couldn't find a 37k resistor, so I used a 15k and a 22k in series. Step 2: Start the vehicle. It's advised to purchase this manual and look up the exact instructions for removing the dashboard. Once the tab has been depressed, you can easily remove the electrical harness. 8 months ago Step 3: Check the dashboard to verify that the check engine light does not come on. Is there any way to bypass the evaporator temp. 2021 In some cases, you'll have to reinstall the support clip on top of the sensor. Tried this on my 2007 Ford Fusion that has manual environmental controls. All video I have seen show you jumping ports 3 & 4 on top of plug going from left to right with resister {purple wire and yellow wire with purple strip} Car is a 2011 ford fusion port 3 has no wire in it and port 4 wire is purple. Often, this feature is available on both passenger and driver sides. The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent. Make sure you give yourself plenty of time to complete this task in one day. 2 years ago. The EVAP temperature sensor has an electrical harness attached that powers the unit and sends signals to the vehicle's ECM. Question Question Step 3. Also, did it screw up your heater at all, as others have talked about? This will give you a "clean slate" in which to test the new EVAP temperature sensor. I have a light blinking on my AC control panel and my mechanic told me the code is "bad evaporator temp sensor… Reply Darth 2: a 3D Printed Animated Darth Vader Helmet. 7 months ago, Which wires did you use? Expedited shipping availability may vary. The EVAP temperature sensor has an electrical harness attached that powers the unit and sends signals to the vehicle's ECM. 2 years ago, I'm pretty sure it would work but it's probably still going to freeze up because it's not going to get an actual system temperature reading, Question I have a 95 LeBaron convertible where the evaporator temperature sensor must have failed and was jumpered/bypassed at the connector. The following are general steps that typically need to be completed, but you should follow the steps outlined in your service manual. Repairs covered by 12-month/12,000-mile warranty. The best way of determining that this component is malfunctioning will be to complete an error code download with a scanner. Maintain the same probe – multimeter connections. With all the variance of cable colors and pins being used, I wasn't sure exactly which ones to use. Answer on Introduction, I have a 2006 Ford Fusion it does it have the second wire on the hardest which one should I connect to, Question The former converts gas to fluid, while the former converts fluid to gas while absorbing hea… Get a fair & transparent quote instantly before booking. The AC compressor does not work: Another error code that commonly can be mistaken for an AC compressor failure is P-0533, which indicates that the circuit to the AC compressor is too high. Beyond completing an OBD-II scan, a bad or failing evaporator temperature switch will produce a few symptoms that can alert the driver of a potential issue that should be serviced. $3 instead of $900 to Ford! To turn this feature on or off, follow these steps: 1. 1 year ago. Share it with us! In many cases, when the AC stops blowing hot or cold air, it's due to a malfunction of the EVAP temperature sensor. )I noticed some people discussing concerns that they would not have a working heater in the winter or that the compressor would be running constantly and never getting a break. i keep finding different info as to which 2 pins go the the sensor … What if I put the motorcraft evap temp sensor under the glove box and connect it to pin 13 and 15 will it work instead of the 37 k ohm, so I do not have to worry about freezing the evap or the heater not working. Also if I just slide the resistor in with the wires and pull it out when it starts to get cold will that work? Pay attention to the left connector (it may be green or blue - normally green). This little blue and white box is the A/C evaporator temp sensor assembly. When the remote start front defrost feature is turned on, your front defroster will begin operating when the engine is turned on via remote start. Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator freezing by excessive cooling ... Photo Sensor: Description and Operation Description 1. Step 4: Turn on air conditioning system. Most of the time, the sensor is located towards the rear of the condenser (or closer to the rear of the vehicle as opposed to the front end). Wires BU-BN (blue/brown) and VT-BN (violet/brown) are the wires connected to the temperature sensor (thermistor). Works perfect. Keep the engine running and activate the heater function on the temperature controls and turn up to 80 degrees (if possible). Want to know how to get the air working without removing the dash to change the sonsor Posted by bfinn89 on May 21, 2012. Once the tab has been depressed, you can easily remove the electrical harness. Want Answer 0. On top of the evaporator box you will see a little blue box with a white front and a 3 wire cable connected to it going into the harness. Remove the center shifter cover and the shifter (while removing the shifter from the linkage). The operation of this luxury feature is controlled by a very small sensor called the evaporator temperature sensor or EVAP temperature switch. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. If the refrigerant is full then the problems is more than likely electrical or the compressor failed. Though generic, specific steps may vary depending on the make, model, year, and powertrain configuration of the vehicle. Step 5: Gain access to the AC condenser. The first step in the installation process will be to reattach the electrical harness to the new sensor. I would check for power first at the compressor. The evaporator temperature sensor or switch is a component commonly found on many road going vehicles. The pictures show the resistor assembled. Check here for special coupons and promotions. Ask Your Own Ford Question 2011-16 Ford f series ac fix bad evaporator temperature sensor Remove side dash panel, the door spill plates, and weather stripping, as well as the steering wheel from the center steering shaft. As the air passes the sensor, it reads the temperature and compares that reading to the setting on your thermostat. Place the thermistor in a cup of ice water and you should measure around 27,000 ohms of resistance because the water temperature is around 32 degrees. If there is power then the compressor is bad. I started up my car and was thrilled to see that my once super chilling A/C was again pushing out frigid air. So happy to have A/C working again. Step 4: Remove the dashboard. Replace the thermistor if the resistance readings are off by more than 10 percent. (check here: https://www.youtube.com/watch?v=imnNjh6wGo4). Step 3: Get detailed instructions on removing your vehicle's dashboard. Now a cold gas, the refrigerant passes through the evaporator, causing that part's metallic core to become extremely cold. I bought a new sensor from the dealer but it is not like the one in my 2006 2500 quad cab. Since it's very difficult to reach, this job is typically completed by ASE certified mechanics or larger repair shops with extensive resources at their disposal.