Ok guys i know a lot of you may have, like me, bad run in's with these A/C shops so here is what happened with me.
A/C stopped working no cold breeze.
Check to see if the a/c clutch was engaging - nope no clutch engagement.
Check the relay - swap it with the condenser fan switch relay. Fan coming on then relay good. Swap back.
Bridge the relay to ensure the clutch will engage. The relay pins will look like this: l l
Bridge the bottom two. Clutch engages. Circuit good.
So why the clutch not engaging... Pressure switch on the dryer. If you unplug the pressure switch, you will see two pins on the dryer looking up at you, you should get continuity across the terminals if there is no continuity the system does not have the correct pressure for operation and thus not allowing the clutch to engage.
Went to the A/C shop and they hooked up the pressure gauges and as expected the system had no gas, I had sprung a leak from one line rubbing against another and the aluminum corroded.
They took out the dryer and it was going bad, when you shake it you should not hear anything moving, if you do it is going bad, so we changed it. Next was the expansion valve on the evaporator, basically when the dryer going bad it usually clogs the expansion valve so that was changed also.
Vacuum and re-gas:$350 (new gas 34)
Dryer new: $100
Expansion Valve: $100
Labour: $100 (Bending and re-routing line to avoid this problem and repairing the lines)
So there you go simple. Tell me if I get wood by the cost.
Also most of the Hondas give expansion valve problems and most of the time the dryer will need changing at the same time. If the car’s A/C system works fine but the car cools sometime and then stops cooling but the clutch is engaged then the expansion valve most of the time needs changing.
These are simple test to keep you mind at ease at the shops. If any one can give more info please do.