My temperature gauge heats up when I turn on air con.At night it works fine when air con's on.?

Question

What is my problem? When it heats up, I usually turn off the air con and it comes down.. What wrong here?

Answer 1

It's hotter during the day. The engine's hotter and the AC puts even more strain on it. The radiator can't compensate fast enough for the additional load, so the temp rises. At night you've got a lower ambient temp outside so everything balances quicker.

You might consider having the radiator checked / rodded-out if it's getting on up in years. Also check the specific gravity of your coolant... no too much or too weak.

Answer 2

Your temperature guage will go up in the daytime when it is hot out. You didn't say the car was over heating so that may be a normal cond. Your thermostat may not open all the way up under normal driving and the temperature gauge will stay in the low normal range. It hot weather the temperature guage should go up to high normal where the thermostat opens. Then the guage should go no higher.

If you have an older car some manufacurers did not put adequate radiators to handle extreme heat. So if any component in the system became weak the temperature would go up.

You have several other possibilities in other answers. The key is does the radiator reached a temperature high enough that you lose your fluid. If it does something is wrong in the system. Start with the cheepest thing first. The radiator cap pressure, second the fans, third the thermostat, fourth the hoses, and fifth the radiator and engine block.

Answer 3

The air conditioner runs a compressor, which uses the motor to turn and it also uses the heat extractor( or condenssor in front of the radiator that will heat soak the radiator in turn heating your coolant and raising the temp gauge, but there should be hi fan setting on the motor fan to increase when using a/c so make sure you hear fans kick on when turn the a/c on.

Answer 4

Because the ac condenser is in front of the rad, all the heat from inside your car has to go through the rad now. As long as it only climbs a few degrees, there's not much to worry about. When it approaches the red zone, then its time to give it some attention.
Just make sure your cooling system is well maintained and you should be alright.

Answer 5

You need to have your car's radiator pressure tested at a radiator shop to see if you have a leak somewhere. If not, you may have a bad thermostat....that is staying open. Some times you can see this if you first start up the car when it's cold, and take off the radiator cap and see if the fluid is moving. It should not be. Before you do anything, first check and see if your full of antifreeze.

Answer 6

It sound like something about you cooling system is not working properly. The coolant level is to low, the fan is not working properly, the radiator needs to be replaced. You should get if checked by a shop before you have a boil over.

Answer 7

Check the coolant level and also check the condenser up front it may be full of bugs. Use a hose, like at the carwash and spray it from the inside out to clean it.

Answer 8

without knowing what kind of car it is leaves a lot of possibilities but what it sounds like is that you have a system with two radiator fans. if so one of them is just for the a/c. if this fan isn't working but your primary one is it will cause exactly what you describe. Also check your coolant, if it is low it will also cause this type of behavior

Answer 9

Make sure the fan is coming on when your A/C is turned on.Make sure the condensor is clean and your radiator too.

Answer 10

Sounds like your radiator core is getting rusted. Probably time for a new radiator!