AC Cars & Trucks - Page 2 - Recent Questions, Troubleshooting & Support

DON'T start swapping wires around. Doing that can cause more problems and some of them can be serious. This could also be an alternator issue. Is that Voltage reading with the engine Off? Once you get the engine started take another volt reading at the battery. You should get a reading of around 14.2 volts. If the voltage doesn't change you might have a problem with the alternator not charging the battery. The AC could be a fuse. Try this website for the fuse box locations and layouts. The radio will read locked if the battery has been disconnected, A security feature to stop it working if the radio is stolen. There should be an unlock code in the vehicle documents and there are also websites where you can get it.

low on freon, dirty coils

try to be more clear, what works now or not. just that. tell both good and bad things now, just now. key on, SEE self test of IP cluster (dash) all Lamps glow? then engine starts or does not, key on to start.? car does or does not drive.? well not with brakes dead. you took it in for service with brakes dead? pedal went down at a stop.<<means pedal went to the floor? be more clear on brakes. please. the cluster dies for 4 reasons (tech) fuses blown (hood up fuse box called TIPM Ignition (keyed) switch failures communication failures (Can_bus network) a digital dash is it. Car main battery dead. all you can do lacking tools is check fuses for BLOWN?!

USA car answer, all other electrics good.? no engine told and fuse boxes located different. the cab blower must blow air, does it? the dash AC lamp glows too. if not ,relay stays off first is fuses. IDPM under hood fuse 79 must not be blown. ,frankly I check all fuses. why skip any? the relay A/c is in the iDPM (and its fuses) we scan the OBD2 scan port. this AC needs Can_bus network to fully functional or this A/C can go dead./ the Hi/low pressure switch R134 will trip it all off line if too low or too high both,someone overfilled it. oops, off line it goes. The IDPM under hood IS A computer, and does not nothing if can_bus fails. IPDM E/R (Intelligent Power Distribution Module Engine Room) ahhhhhhhhhhm, i see why you ask this, the IPDM many relays there(LOTS) do NOT REMOVE. NO socket for A/C relay and NO Rn R number assigned but is there the cars users guide is useless for any specific fuse or relay. only the service manual covers all. fuses are first, never relays first then scan the PCM is 2nd. lots to fail here, it is NOT simple. like in 1980 more here https://fuse-box.info/infiniti/infiniti-m35-m45-y50-2006-2010-fuses-and-relays/amp fuse F12 cab JB powers ESC ,compressor control valve. at pin2 above. if the HVAC main controls "ATC" does not send a DEMAND for AC the CLUTCH does not Energized ever. the blower must work JB fuses for ATC must be good, cab box Fuse #6 ,10,11,12 and 19. ignition relay dead ,so be AC/ relay, but engines runs. so not this. if the ATC sees any damper motor dead, it may stop A'/C also most modern cars have s HVAC self test try that?

no car told , maker,year, model . if you just follow the A/C R134 lines the high/low switch is found. many are on the receiver /dryer can. no to car models and engines are the same or for locations no car or truck told. the service manual covers all this , get one?

Very much could be the one for the evaporator. Your best bet is to find a trained shop that actually knows what they are doing

if compressor is damaged yes it could cause belt breakage --bring to another shop for second opinion

Did you replace the orifice tube?

There are several possible reasons why your blower, vent, defrost, AC, and heater might stop blowing air:

1. Blower Motor Failure: The blower motor is responsible for blowing the air through the vents. If the blower motor fails, you will not get any airflow from the vents.
2. Blower Motor Resistor Failure: The blower motor resistor controls the speed of the blower motor. If the resistor fails, the blower motor may stop working or only work at one speed.
3. Fuse or Relay Failure: A blown fuse or faulty relay in the blower motor circuit can prevent the blower motor from working.
4. Control Module Failure: The HVAC (heating, ventilation, and air conditioning) control module is responsible for controlling the blower motor and other components. If the control module fails, it can prevent the blower motor from working.
5. Vacuum Leak: If your vehicle uses a vacuum system to control the vents, a vacuum leak can prevent the system from working properly.
6. Broken Blend Door: The blend door controls the direction of the airflow. If the blend door breaks or gets stuck, the air may not flow through the correct vents.
7. Wiring or Connector Issues: Faulty wiring or connectors in the blower motor circuit can prevent the blower motor from working.

lots and lots of causes. (and tests using tools) go to auto repair shop of diagnosis.

1. the blower motor is dead.
2. AC compressor off line, see that clutch on front?
3. Freon leaked out. as they love to do.
4. engine overheating does shut off AC.
5. do all vents fail in all cold modes? yes/no.
6. if all fail the blend door damage is stuck at heat only we fix that now. (ask)
7. google why car A/C fails ,endless vast answers and lots of test. or get book on subject and read.?
8. are you asking how to do real tests or GUESS?

overheating? has many causes., if IS? yes with A/C ON sure. sure going fast the radiator cools better (higher gears) OVERHEATING SIGNS ARE WHAT; BOIL OVER? OR JUST DASH GAUGE TOo HIGH? coolant leaks to ground or to front passengers toes? 5 year old hemostat should be good fans kick on , at rear of radiator or are they dead? off hand blind and deaf, the fans failing, on this 2017 car. check fuses yet? scan the PCm for fan errors or? more causes 1: dead bugs plastered to radiator or front AC condenser. (back blast it with water hose nozzle) new RAD do check condenser, same fix, cleaned. 2; belt slipping to water pump. 3: water pump impeller rusted to 1/2 its normal size 4; fans fail.

The A/C circuit is daisy chained. You need to find a wiring diagram and find out what is the first thing in the circuit, then make sure that is passing electricity on to the next item.

The wiring diagram for an A.O. Smith AC motor may vary depending on the specific model and application. However, here are some general steps to reverse the direction of an AC motor:

1. Turn off the power supply to the motor.
2. Locate the motor leads and identify the run winding leads (usually labeled T1 and T2) and the start winding leads (usually labeled T3 and T4).
3. Swap the positions of the T5 and T8 leads.
4. Swap the positions of the T2 and T4 leads.
5. Turn the power supply back on and test the motor. It should now be running in the opposite direction.

It is important to note that reversing the direction of an AC motor may affect its performance and may not be suitable for all applications. If you are unsure about the wiring or the suitability of reversing the motor, it is recommended to consult a qualified electrician or technician.

If your Thermoking APU fan is cutting on and off, it could be due to a variety of reasons, such as:

1. Temperature settings: The APU may be set to turn the fan on and off based on temperature settings, so it could be turning on and off as it reaches the desired temperature.
2. Sensor issues: The temperature sensor or thermostat may be malfunctioning, causing the APU to turn the fan on and off incorrectly.
3. Electrical issues: There may be an issue with the electrical connection between the APU and the fan, causing it to turn on and off intermittently.
4. Mechanical issues: There may be a problem with the fan motor or the fan blades themselves, causing the fan to turn on and off erratically.

Platinum plugs are gaped at . 060 (oem). Iridium plugs are an upgrade and should be gaped at . 040.

Most likely a loose/worn air conditioner compressor belt. This is the belt that rotates the compressor. Could be belt tensioner needs replaced, though. Or, might be a problem with the idle pulley. The screech is from the belt or bearings. This is unlikely to be fixed with a lubricant, FYI, other than temporarily. Check this site: https://www.carcarehacks.com/why-is-my-car-ac-squealing-and-how-to-fix-it/

Please check pressure cut-out wiring

what end goal is , no told the why quesiton?+ 1: to run like that forever. 2: or to just do a test, sure why not but PS dead will scare most kids 15yo or girls to ***** and panic,., (steering gets super hard) not my wife I taught here to drive 1960s style, lost of PS and boosted brakes and what to do. back then and older engines love to stall. endlessly,(not mine I put CDI on all I owned) my guess just testing, but not driving.> or yes driving.? sorry all I have are questions, yes done it vast times, to find which bearing is bad and screaming for help, but I have a stethoscope to find those, no tricks needed. the drop belt tricks are well known for 100 years. top cause, PS pump has wrong Fluid put in and foams up. see it vast times. or ALT bearings shot. front or rear. most water pumps leak if bearings bad, (weep or leak) AC compressor the clutch bad bearings. sure. good luck. (late post)

the resistor is to slow down the speed, when it goes out it will only work on high

If your 2009 Mercedes-Benz MP3 model truck's gear is not working in automatic mode and only working in manual mode, there could be a few potential causes. Here are a few steps you can try to troubleshoot and solve the issue:

1. Check the transmission fluid level: Make sure that the transmission fluid level is at the correct level and is not low. Low transmission fluid level can cause gear shifting problems.
2. Check the transmission filter: The transmission filter may be clogged, preventing the gears from shifting properly. Replace the filter if necessary.
3. Check the transmission control module (TCM): The TCM is responsible for controlling the automatic gear shifting. If it's malfunctioning, it can cause gear shifting problems.
4. Check the gear selector switch: The gear selector switch may be malfunctioning and preventing the gears from shifting properly.
5. Check the solenoids: The solenoids in the transmission may be malfunctioning and preventing the gears from shifting properly.
6. Check the transmission control linkages: The transmission control linkages may be damaged or disconnected, preventing the gears from shifting properly.

If you are not comfortable with checking these things, it's best to take the vehicle to a certified Mercedes-Benz mechanic to diagnose the problem. The technician will be able to identify the problem and repair it as necessary. It's important to note that some of these steps may require special tools and knowledge of the vehicle's transmission system, so it's best to take it to a professional mechanic to avoid causing more damage.