Working AC, at last!
Posted: Wed Feb 27, 2019 3:03 pm
Hi
I thought I'd post about the AC system, just to give other owners the heads up. My AC wasn't "working", so I had a re-gas specialist friend come and have a good look at the system for me and this is what we discovered.
1. The compressor will remain off when there's no gas in the system, or when there's low pressure. This is quite normal for cars from the 2000s onwards, but it's very, very unusual for a car from the early 90s. I mention this as my initial diagnosis was that the compressor itself was seized or faulty, whereas in reality the system could detect low pressure and the compressor had simply turned itself off.
2. The compressor doesn't affect the static revs as you'd expect; normally, you put the AC on and the revs immediately drop, but this isn't the case with the Honda. On most cars, when the revs don't drop you assume the compressor isn't engaging, but that's not the case here. It will kick in and out, but at normal idle speed the Honda compressor can still work and run the AC to around 9-10 degrees vent temperature.
3. The Honda AC system changed 6 times in the life of the 4g, almost every year, so that can mean fixing a non-working system could be tricky.
4. The Honda AC system takes 600g of gas, that's about 200g-300g more than a car of this age would normally take. Most modern systems only accept 120-150!!
5. The Honda AC system, when fully working, will get the vent temperature down to 3 degrees; that's very, very cold! Indeed. most modern systems will struggle to get to 9-10, and the very latest systems are between 12-13.
6. The Honda AC system will continually cycle, so you'll get 3-4 degrees for 10-15 seconds, the compressor will lift off and it'll rise to 8-9 at which point it'll kick in and go back down to 3-4. You don't feel this temperature rise in the cabin, it remains cold throughout.
7. There's a factory-fitted clip on the bottom left-hand side of the condensor radiator, as you're stood at the front of the car, and it's the SAME colour under UV light as the testing dye is! Initially, we thought there was a leak until we noticed that it was in fact a clip!
So, an hour spent today on the system means I have fully working ice-cold (and I mean ICE-COLD) air-conditioning.
Regards
I thought I'd post about the AC system, just to give other owners the heads up. My AC wasn't "working", so I had a re-gas specialist friend come and have a good look at the system for me and this is what we discovered.
1. The compressor will remain off when there's no gas in the system, or when there's low pressure. This is quite normal for cars from the 2000s onwards, but it's very, very unusual for a car from the early 90s. I mention this as my initial diagnosis was that the compressor itself was seized or faulty, whereas in reality the system could detect low pressure and the compressor had simply turned itself off.
2. The compressor doesn't affect the static revs as you'd expect; normally, you put the AC on and the revs immediately drop, but this isn't the case with the Honda. On most cars, when the revs don't drop you assume the compressor isn't engaging, but that's not the case here. It will kick in and out, but at normal idle speed the Honda compressor can still work and run the AC to around 9-10 degrees vent temperature.
3. The Honda AC system changed 6 times in the life of the 4g, almost every year, so that can mean fixing a non-working system could be tricky.
4. The Honda AC system takes 600g of gas, that's about 200g-300g more than a car of this age would normally take. Most modern systems only accept 120-150!!
5. The Honda AC system, when fully working, will get the vent temperature down to 3 degrees; that's very, very cold! Indeed. most modern systems will struggle to get to 9-10, and the very latest systems are between 12-13.
6. The Honda AC system will continually cycle, so you'll get 3-4 degrees for 10-15 seconds, the compressor will lift off and it'll rise to 8-9 at which point it'll kick in and go back down to 3-4. You don't feel this temperature rise in the cabin, it remains cold throughout.
7. There's a factory-fitted clip on the bottom left-hand side of the condensor radiator, as you're stood at the front of the car, and it's the SAME colour under UV light as the testing dye is! Initially, we thought there was a leak until we noticed that it was in fact a clip!
So, an hour spent today on the system means I have fully working ice-cold (and I mean ICE-COLD) air-conditioning.
Regards