Air conditioning, speedometer, and rear wipers stopped working

After repairs, my air conditioning, speedometer, and rear wipers stopped working correctly.
Experienced mechanics share their insights in answering this question :
To answer this fully, I would need more information as to what the original problem was and what repairs were performed. This sounds like a case of a shorted wire somewhere as these systems you listed are normally unrelated. A qualified technician, such as one from YourMechanic, will be able to inspect your electrical circuits and make repairs to get everything working again.

How to Identify and Fix Common car Problems ?

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There are a number of reasons why windscreen wipers stop working and these include: torn wipers, broken controls, a blown fuse, faults with the motor, damaged arms, snow or ice covering, loose pivot nuts and a break in the wires.
If your wiper motor runs but the wipers don`t move it`s most likely a mechanical problem, so you should start by examining the wiper assembly. This might be a disconnected wiper motor link arm, a jammed transmission, or locked gear.
Wiper pivot nuts are loose.

The wiper arms are splined as well and have a hole through the base. A nut tightens onto the pivot stud to hold the wiper arm tightly to the pivot. If the nut is a little loose – which is common – the wiper motor will turn the pivot but the wiper arm will not move.

Common signs include wiper blades that move slower than programmed, only have one speed, do not move at all, and don`t park in the correct position.
Before the wiper motor goes bad, you will probably experience a blown wiper fuse, which is intentional. The fuse is designed to be the circuits weak spot, which protects the wiper motor. Essentially, if your vehicle`s wiper motor is being overloaded, the fuse will blow to ensure the motor does not become damaged.
It sends out a beam of infrared light that, when water droplets are on the windshield, is reflected back at different angles. This tells the system to activate the wipers, as well as adjust wiper speed and frequency based on the intensity of the precipitation combined with the vehicle`s speed.
Driving with a broken rear wiper is dangerous not only for you, but for others on the road too. The good news is that it`s very easy to repair or replace your rear wiper.
Burnt out fuse: The windshield wiper fuse will automatically burn out if the wiper motor is overloaded or something is blocking it. Wiper pivot nuts need to be tightened: If the pivot nut is too loose, the wiper arm may stop moving even if the motor still works.
While the legal requirement for a rear windshield wiper changes from location to location, its purpose, to clear the rear window, is still important. Without a functioning rear wiper, it may be more difficult to see behind your vehicle in traffic or when reversing.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Windshield wipers stopped working. They’ll suddenly stop working then suddenly start working again. Has been happening for a week.
ANSWER : The problem you are describing likely stems from an intermittent electrical fault in the wiper circuit. The windshield wiper system uses a small electric motor to move the wiper arms that you see on the windshield. That electric motor is controlled through a switch, relay, fuse, and wiring. One, or more, of those electrical components has failed although it is also possible that the mechanical arms are binding (seized, if the lubricant has dried out) thus causing the electric circuit to the motor to overload. Regardless of the underlying fault, if you request a non functioning wiper diagnostic/repair, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Air conditioning, speedometer, and rear wipers stopped working
ANSWER : To answer this fully, I would need more information as to what the original problem was and what repairs were performed. This sounds like a case of a shorted wire somewhere as these systems you listed are normally unrelated. A qualified technician, such as one from YourMechanic, will be able to inspect your electrical circuits and make repairs to get everything working again.

My 2003 Hyundai air conditioning works fine but often starts blowing hot air, especially when idling.
ANSWER : Hi There,
It sounds like you may have a condenser fan that may not be cooling the AC condenser properly. As you may know, the job of the AC condenser fan is to cool down the AC condenser as it generates a lot of heat during the course of its primary function, which is to convert the AC gas refrigerant into a liquid form, a process that generates a significant amount of heat. As the AC condenser fan blows cool air across the condenser, this allows the condenser to remain cool, keeping the pressure down in the AC system which helps to generate cooler air. I would suggest having a professional from YourMechanic come to your location to take a look at your vehicle.

Front fan is not blowing any air just stop working. I turned the air on and heard a popping sound. Rear is working blowing cold
ANSWER : It’s possible the blower motor, or possibly just the blower resistor block, has failed. To determine which of these (or other) possibilities are involved, please request a fan/blower motor diagnostic and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Air conditioning not working in the front of my SUV
ANSWER : My guess is that the refrigerant level is low (from a leak somewhere) or there is a problem with the AC pressure cut out switch. The control module will cut power to the AC compressor if it determines the system does not have the correct pressure due to a low refrigerant level.

Disconnecting the battery probably temporarily reset the control module. There may or may not be codes stored in the HVAC system to aid with diagnosis.

You should be able to wiggle the large fuse out with your bare hands or gently remove it with a pair of pliers.

Finally, I do not think any of this has to do with the oil change that was performed.

air conditioner started making loud screeching noise and started only blowing hot air, then the noise stopped but still only blows
ANSWER : The noise is possibly from a failed compressor clutch or the compressor itself is faulty. Another possibility is the pulley bearing on the front of the compressor has failed. The issue should be fairly evident to the inspecting mechanic after some simple tests. To resolve this, the recommended diagnostic is an a/c system inspection. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Air conditioning doesn’t work – 1988 Jeep Grand Wagoneer
ANSWER : Check the fuse for the heater/AC blower motor. If the fuse is good, then either the blower motor resistor or the blower motor itself is suspect. The blower motor resistor provides for multiple speeds for the blower motor. A professional mechanic, like YourMechanic, can diagnose and replace the failing component.

Honda Civic 2008. AC stopped working suddenly and engine check light came ON for a day.Next day AC worked and no engine light.
ANSWER : Hi there. In both cases, when an AC system is not working and a warning light is coming on the dashboard, typically a professional mechanic will complete the same initial inspection, which is to download the stored error codes that triggered the warning light initially. This tends to give them an idea as to what is causing the problems. This could be something as simple as an electrical relay that is faulty or loose or an indication of a computer related "glitch". Either way, the best way to move forward is to have a professional mobile mechanic complete a check engine light inspection.