ac stopped working after battery change

The electronics of some newer cars can go into an incoherent state after a battery disconnect. Incorrect battery placement is the most common problem when a thermostat refuses to work after changing the batteries.

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All the motors for the AC mode and heater doors will recalibrate.

. It may be possible that one of the fuses or relays blew when the battery or alternator were disconnected. Check for the fresh air coming from the AC vents. Now start the AC while the car is running.

So has to charge the battery and it started with no issues. The battery holder should have indications of the direction the fit into the case. If there is no power on the r wire the thermostat has no way to call for heatcool.

Our thermostat died yesterday but after replacing the dead batteries with fresh batteries and confirming the LCD screen was operable our AC no longer turns on. After starting the vehicle dont disturb the heater controls for 3-5 minutes the actuators have to go through a self calibration. I hope this answers your question.

If a reset doesnt correct the problem there may be a couple of problems at work here. Disconnecting the battery again wont correct it - its an onoff thing with the key. There are 2 things that need to be reset after disconnecting or replacing the battery.

If the refrigerant has been depressurized somehow the climate control will not blow cold air. Last week I had my AC drained and refilled because it wasnt cooling well. If the battery and charging system passes have the codes for the HVAC system retrieved to begin the diagnostic process but since you ve said that this didn t start since you had battery issues I would lean toward what I mentioned from the beginning.

I have attempted a factory reset on the thermostat and I do hear a quiet but definitive click when I believe it is attempting to activate the HVAC unit but thats as far as it gets. While we were doing this we also disconnected the battery for a while to reset the computer because my 4 wheel drive wasnt work properly another long story. Its in the fuse panel above the glove box.

Battery damp 2 clicks S229 If the display shown at left appears after the battery is replaced with a new one remove and re-install the battery once or twice. Just after disconnect the battery and connected back the air blows but not cold. All your radio presets will be lost and you will have to re-enter all.

Replaced the starter after that the battery wasn t charged enough to crank. Retest and verify correct ac operation. Late model vehicles have many computerized systems.

Double check your battery and make sure it is perfect before you turn to the AC system. After 2 minutes reinsert the fuse and then start the vehicle. Should work normal after that 2.

Turn on your Chevy Silverado. If you recently serviced the electrical system and now your AC is no longer working then it may be possible that the issue is related to the work. I read this too late.

Bezel 90 clockwise Press AC switch orcounterclockwise connector. Replaced my battery this am and got back in the car and the entire dashboard turn signals windows will not roll updown and automatic door locks are not working. Try taking out the fuse for the HVAC module.

I have a 2008 528i and just replaced the battery. When the battery is disconnected the actuators controlling the climate control can lose their position. Its possible something was pumped or snagged.

Now the air conditioner will not properly work. Well once we reconnected the battery and had the AC recharged it now only blows out HOT air. After restoring power start the car and do not touch any controls.

If a Max AC is setting choose that option. Until it clicks twice. If it fails replace it 3.

So after they calibrate give the ac a try. When your AC isnt cooling properly you may want to check your outdoor unit. Sometimes it will slowly blow some cold air but it will not blow as strong as it should.

UW01 UW02 Short-circuitthe battery damp and the reset terminal with tweezers. To accomplish this start the vehicle and roll each window down and hold for 1 second. Let the car calibrate the sensors.

It also sounds like the AC system may have lost some pressure. My watch still wont go with the new battery. Problems After Replacing the Watch Battery in Your Watch Sometimes after changing the battery in your watch it still wont go or if it has a digital display this wont work or the display is not right.

If the outdoor fan isnt spinning first check the breaker or fuse box. Start the car but DO NOT TOUCH the AC controls. Finally you may need to take the car to the dealer for a computer reset.

Replace batteries on a honeywell thermostat heat ac or back light not working. The digital display on my watch is not working. Remove it wait a few minutes then put the fuse back in.

The arcing during battery reconnect is typical if one or more electric services were turned on at the time like your stereo or alarm. Honeywell thermostat heat not working after battery change. There can be more than twenty modules on each vehicle and many of these modules have some sort of learned memory which may be lost when the battery is disconnected.

Electrical Issues After Replacing the Battery. Turns out the single 5A fuse for the ODB controls. Each window has to be reset.

The first thing I would do is check the vehicles fuses and relays. Have the battery monitor reset. Air Conditioner Fan Not Working Outside.

It never did this before the actuator change. Here are some tips that might help. It did this once after we had to jump it off because of the dead battery but it started back working fine after the next time we started the car.

By fat fingering the arrow keys to advance to next setting or change setting. A few days later I started having the problem of the AC defaulting to Defrost mostly in the morning after first start up. Also check if it is being circulated properly inside.

Test battery 2. Yes the air conditioned worked prior to this. If I turn the truck off then restart the problem was solved for the day unless it sat for a couple hours.

In most cases each system is under the basic control of its own computer module. One theory I have is that the batteries were. After a few minutes then adjust the HVAC settings and see if it fixes it.

With the car off unplug the climate control or HVAC fuse and wait 30 seconds before plugging it back in. Set the AC in your Chevy Silverado to its highest fan speed setting. The climate controls should now.

Open the thermostat check the battery placement. They think they are in the cold position when they are really in the hot. Up to 20 cash back The fuse to pull for this is the HVACECAS fuse in the underhood fuse block.

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