How to test the temperature of the AC vent?
Then allow the AC unit to run at least 15 minutes. Place the thermometer on a vent and leave it in place for five minutes. Write down the temperature. Move the thermometer to a return vent and do the same. The air coming out should be 14 to 20 degrees cooler than the air flowing in.
What causes an engine temperature gauge to stay on cold?
Reasons Why your Engine Temperature Gauge Stays on Cold 1. Faulty Engine Coolant Temperature Sensor 2. Faulty Gauge/Cluster 3. Broken wires to the sensor or to the gauge 4. Bad Thermostat 5. Corrosion in connectors 6. Air in the coolant system 7. Broken engine control unit
How long do you leave a thermometer on a vent?
Place the thermometer on a vent and leave it in place for five minutes. Write down the temperature. Move the thermometer to a return vent and do the same. The air coming out should be 14 to 20 degrees cooler than the air flowing in.
When does your car run hot or cold?
If you are like most drivers, our guess would be almost never. Most drivers look at their temperature gauge so rarely that many vehicle manufacturers don’t even include temperature gauges any more but just lights that will come on if your car is either extremely cold or extremely hot.
What should the air vent Temperature be in a car?
Place a probe thermometer into the lower air vents on both the driver and passenger sides. Any reading around 115F-120F (46C-49C) is acceptable. Some vehicle manufacturers boast their heaters will do 135F-155F (57C-68C) which would make things very toasty indeed.
Where do I get a vent thermometer for my car?
You’ll need a thermometer with a long probe that can go into the center air vent on the dashboard of your car. They are readily available at most auto parts stores and cost just a few dollars.
What should the temperature of my AC be?
Well, there’s not a universal, fixed temperature your AC should always be blowing. The temperature your AC puts out is relative to the temperature you set on your thermostat. So even though there’s no single ideal temperature, you do want a 16°–22° F difference from the supply air and return air.
What does it mean when your engine temp is cold?
If you are getting heat from your vents, the indicator is reading cold, that means you have trapped air in your system (HG failure) or the sensor has failed or the wiring is faulty. If you have a cracked HG, you should be able to see bubbles in your coolant either by opening the rad cap or monitoring the expansion tank.