Hey guys I had a h22 swap into 94 accord few months ago.One of my friend did the installation and labors in his little shop.Right after he finished the swap and gave it to me.The car started overheating in same day. I took it back to him to fix the problem.His solution was to put both fans on for all the time.Overheating problem went away by his solution.Since then whenever i start the car both fans turn on.When I asked him is it the really only solution for overheating problem he said hell yeah h22 is way bigger than your stock engine so we have to run both fans for cooling.Honestly his answer didn't really convinced me at all.After couple months later when weather got warmer I went to local mechanic shop to put some freon into the a/c comp. but mechanic said if i keep running both fans all the time i wont be able to use a/c .According to what he says one fan is for engine and the other one is for a/c comp.Therefore i am stuck between these two guys one says"h22 is a big engine so you have to run both fans all the time for cooling"the other says"if you want to use a/c you have to use only one fan for engine cooling" .I need some suggestions please help me out thanks.

 

i have a h22 swap in my del sol and i took it to the track last summer with no fan just a full size radiator and had no overheating problems

 

The A/C will work even if both fans are running, cooling may not be as good because head pressure will not climb, but that's no biggie, we do a lot of systems in hot rods where a single eletric fan is used for rad and A/C condensor, when A/C is not on fan is controled by a thermostat switch, [ECT switch] but when A/C is turned on the fan is controled by the A/C pressure switch so as long as A/C is on, the fan is on.

In most Honda/Acura with A/C and two fans, the rad fan is controled by the ECT switch that turns on the rad fan, when A/C is on a pressure switch will turn on both the rad fan and condenser fan when head pressure gets too high, [175-200 PSI].
In short the A/C guy does not know what he is talking about, for that matter either does your engine guy, you could connect the ECT switch output directly to the rad fan relay so rad fan is only on when engine temp. is over 198-200 degrees F, that would fix the rad fan problem, you could do about the same with the condenser fan, connect the output of the A/C pressure switch to both the rad fan relay and the condenser fan relay, use diodes on the control leads so condensor fan does not turn on when only the rad fan is needed.

That would be one way to get them to work when needed, the other way of corse is to fix the problem properly. 94