bitchasscracker

well i finally got the ac to work in my car the only problem is the compressor clutch dosent turn on and off by ifself i got it rigged up. my question is how often should i be fliping it on and off ? every few mins or is it ok just to leave it on all the time

Racintweek

the compressor clutch must be engaged for the a/c to work to its full potential. if you disengage it while you still have the fan running you are only going to get cool air until the evap coil is robbed of all its temperature and then you are just blowing air.

Scott-EP

it isnt supposed to cycle on a timed schedule. it works off of temp from the evaporator. if you leave it on too long you will freeze up your evap. if you dont run it enough the air wont be cold enough. as HMT as the switch is you should really get the temp sensor hooked up. also, it cycles more when you are moving and a lot less when you are at stop lights

SpankedYA!

Crazy low suction pressure builds ice.

Tom-Guy

That's great if you own a FORD or some make of car with a cycling compressor system.

Honduhs use thermostatic expansion valves in place of fixed orifices, the pressure switch is used as an emergency shut off and nothing more. If the system works correctly then the compressor is running all the time.

y7turbo

Not when were talking about variable capacity and variable airflow systems in cars. Even with the txv controlling superheat, its still going to cycle the compressor on the thermostat mounted to the evaporator which is set at around 38*. how do you think you get a uber huge temp drop across the evap on cars? Lower airflow then whats needed for that systems capacity. without that thermostat or freezestat as i call it cycling the compressor, the evap will freeze even when using a txv.

Bone1

Sorry Joseph, Honda's cycle the clutch.AC Thermostat testing on pg 22-14 of my 1995 Factory manual

circuit open at 37 degress or less, circuit should close at 39 degrees or more

Tom-Guy

I've replaced over 14 THX valves on Honduhs. In the field the compressor doesn't cycle unless you have a problem with THX blockage - high side pressure goes up and the system shuts off the compressor.

The incoming warm air is going to keep temps above the freeze point. 38-42 degrees at the vent is what the thermometer says, no cycling.

bitchasscracker

so i should just put it on a switch and periodicly turn it on anf off ?

ososlohatch

no you should reply to my pms nig nog