Why does the engine stop cooling at 3000rpm?
The ” stops cooling at 3000rpm ” is exactly what @Anarach stated, in that the clutch disengages above this to allow more power to the engine. It could also do this so as to not over spin the A/C compressor. If you’re engine is hitting the 3000rpm at 100kph, this is probably the reason.
Why is my AC not working at 3000 rpm?
While I cannot promise the values will work for your Lancer due to regional variations, the fact that there is a high-side cutoff can explain the AC not working above 3000 RPM. What’s so special about 3000 RPM?
What happens to the compressor at 3000 rpm?
The higher the engine speed, the faster the compressor spins. The faster a compressor spins, the higher its discharge pressure. It looks like around 3000 RPM the compressor is able to nudge the high-side pressure past the allowable limit, causing the switch to intervene and disengage the compressor clutch ( hiss…
What happens to the a / C when you go over 100kmph?
The a/c cools just fine under 100kmph. But when I go over 100kmph, or accelerate above 3000rpm, it stops cooling. And once I go under 100kmph, it starts cooling again. There’s also loud hiss that comes from somewhere inside the dashboard whenever this process takes place.
Why does the a / C cut out when accelerating?
Somebody told me this happens because the designers thought if you were accelerating, you probably need all of the power of the engine, so the A/C compressor stops running to allow the engine power to be full-bore. Whether or not that is true, is there some way (some adjustment under the hood) to prevent that from happening?
When does air conditioner cut out when going up hill?
Q: Air conditioner cuts out when accelerating or under pressure going up hill. I noticed today that whenever traveling and accelerating like going uphill for an extra length that my a/c will quit blowing and as soon as I level off or the need to accelerate levels off it will resume blowing. My car has 197000 miles.
When does the AC compressor cut off at WOT?
The AC compressor cut off is at WOT (pedal to the floor) only. Does the airflow continue and get warm, or does the airflow stop or switch to the defroster outlets? If the airflow stops or switches, then you have a problem either with the vacuum check valve to the AC system, or a vacuum leak after the check valve.
What happens when you cut off the a / C CLUTCH?
Your car sounds like it is operating exactly as designed. When you mash down the go pedal, the TPS (throttle position sensor) gives the WOT (wide open throttle) signal to the PCM to momentarily cut off power to the A/C clutch which disengages the A/C.