A/C question

[clay2022]

of all times and its now getting hot and my a/c decides to take a dump. i did a couple basic checks but im pretty sure the compressor is shot. to check the to see what was going on I directly wired the compressor to the battery and used a jumper wire to check the relay. when i connected the wires to the battery the compressor cycled but it was still blowing warm air, so i elected to put a new relay in to see if that was the problem and nothing the compressor didnt cycle on. i was hoping it was something simple but i now fear it is not. has anyone ever replaced the compressor themselves? i was thinking about having it drained and just replacing it myself. how much of a pain is it to get to? also if i do have to replace the compressor how do i know which compressor i have?

 

[YukonJacks]

Are you sure you don't have a leak, check all connections on the suction and liquid lines on your ac system. The suction is the larger of the two. Look for oil around any connections. This is a simple fix. I work for an HVAC wholesaler on we sell 1 lb cans of 134a with the oil in it also. If it is the compressor, you'll need refrigerant manifold and hoses, along will special connection adaptors, the adaptors alone are + $60.00. Your dealer will be able to tell you what compressor you have using the last 8 digits on your vin#

 

[clay2022]

thsk i will check the lines, but gonna need a compressor anyways

 

[72hotrod]

This is a big job which if you try and cut corners will not be successful and will cost you MORE money. You need to recover the refrigerant and check the orifice tube for trash. If it's chock full of metal, your whole system is contaminated from compressor failure. If you flush out all the metal and old oil from your lines and evaporators, REPLACE the rear TXV and front orifice tube, compressor,accumulator, condenser and all o-rings and sealing washers, and add an in-line filter between the condenser and "Y" in the line, add back specified oil amount, vacuum system thoroughly, and recharge refrigerant to OEM amount, you can make it work good as new. Try to flush the condenser and the repair will fail. If you don't flush the whole system it will fail. Trust me on this, it's a big expensive repair and not every A/C shop will do a thorough job, even though you pay them a lot of money. But if you want to DIY, these trucks are easy to work on. So if you learn the proceedures and can get the tools, it's not hard to do, just involved and time consuming. A hard charger could do it in a weekend, but don't rush through anything you're unsure of! You NEED to do your homework. Go to the forum at ackits.com for help and advice. The sponsor there can save you money on parts and tools,too.

 

[kcciticard]

I have a quick question. What exactly is the rear txv, and where is it located?

 

[72hotrod]

Thermal expansion valve, at the inlet of the evaporator in the rear A/C module on the passenger side behind the wheelwell, senses the temp of the evaporator and controls refrigerant flow.