Another swapped 240 ac question

[Socalgal]

So I'm positive it's been covered but I can't seem to figure out exactly what I need to do. The electric fan on the ac condensor does not operate and my car runs to hot.

S14 se with s13 sr
S13 sr ac compressor with custom lines
Wiringspecialites harness
Flexilite rad fan with built in thermo
Power fc
Lots of other stuff but doesn't matter.


I got the car with the swap done but no ac. I live in socal and it's hot as tits. I've done a lot to get it blowing cold. It's working now (we'll see how long it last this time) but the condensor fan doesn't work. I know the relays and fuse is good, and also that the fan itself is good. Could someone please point me in the right direction? I'm sure I'm not the first to ask this question but I can't seem to find an anwser.

I was an electrician for quite a few years when I was younger and I'm considering going into the fuse box and just rewiring the high speed ac fan relay to be triggered by the condensor relay but if there's a simple thing that needs to be done elsewhere that's been overlooked I'd much rather do it right. I'd be very grateful for any help.

Thanks for your time people.

[moso]

I would check into the wiring in the s14 FSM. I am not sure how its wired but i know that the s14 and s13 use different ways to trigger the A/C fan. the s14 uses a triple pressure switch in the accumulator/drier and the s13 uses a thermal switch in the lower radiator hose. this simple difference in wiring may be causing your problem, however I am not positive on this. i also suggest that you do not wire the fan to trigger with the compressor relay as the compressor will turn off when the a/c system reaches its highest pressure and generates the most heat. you can either wire the fan to run whenever you turn the ac on and have it stay on, or you can wire it up like the stock s13 using the temp switch plumbed into the LOWER radiator hose (check out my sig) you should use the stock s13 sensor.

[Socalgal]

Hi there.., thank you for thereply.

After looking further into this I found out that the s13 chassis (I have a s13 redtop) used something in the engine bay to trigger the fan while the s14 chassis (I have s14 chassis) used the ecu to trigger the fan. So there was no way to make it "work like stock. I figured out a way to wire a relay to the thermostat on my flexilite so that when the engine reaches temp it closes the relay and turns the ac fan on high. I have the condensor fan pushing and the flexilite pulling. Should come in handy as the temp continues to rise. Shoot it's only april and we've already hit 100 degrees. Now I just have to figure out why my condensor isn't cycling. The clutch just stays on all the time.

Ps, nice write up. Very specific and I love that it even comes with part numbers.

[moso]

again the s14 uses the triple pressure switch to control the compressor where the s13 uses a simple pressure switch. both have the switch in the same location, the accumulator/dryer. the acc/drier is the beer can looking thing by the battery. in this case its possible that the switch is simply bad. you should be careful running your ac like it is, overcharging the ac can end in catastrophic failure of parts. not to mention its just plain bad for the compressor. thanks on the write up, good luck with your ac i feel your pain as i live in new orleans.

[Socalgal]

So an update. Fans are working, compressor is cycling when the car is sitting at idle. But it runs hot while crusing. It's fine when parked sitting still but if I'm on the highway the temp will rise consistently until I turn I off at 95 ish degrees centigrade (read on my power fc). My car has pleanty of cooling fans, I've bleed the bejesus out of the coolent system, everything seems to be working as it should. Just too damn hot.

So this may be a dumb question but can the compressor be bad and still cool? Like could it be putting to much load on the engine? I've noticed that the clutch (center section) of the compressor spins easily when the car hasn't been run but if I park and mess with it after it's been running it's really really hard to turn. Not to mention very hot, but everything is in this state. Could someone with a properally working sr please try this and see if this is normal?

I'm aware of the triple pressure switch and that was taken care of by my shop that specializes In these cars when we did the ac the first time. It looks like they jumped 2 of the four wires. The compressor still cycled correctly and I was told it was correct so vie left it like that. I also replaced that canister because the system had been opened for so long. Moso thanks again.

[moso]

none of that would worry me, i could see upper radiator temps reaching over 100c on a hot day, especially with the a/c on.

[Socalgal]

I read conflicting things on that but my tuner (very good and well known) suggested I don't push it much over mid 90's. It's also this point that I shut off the air and deal with the heat. Once I turn off the ac the car cools back down. I'm pretty sure if I kept it on at would rise until it overheated. I don't really want to try this..., I like my motor.

What temps are some of you sr guys seeing on hot days with ac?

[onr240sxse]

Both of my s13's temps rise when cruising with the A/C on. One car has a sr20 w/koyo radiator and electris fans, and the other is stock. I know on my sr'd car it is hard to get enough air through the radiator when you have an FMIC and condensor for it to go through. Also, check to make sure that the compressor psi isn't too high. This can cause the condensor to become hot and then that air is pulled through the radiator.