AgAcGuy12 said:
When is the last time your system was actually serviced by a competent company? Some claim to do tune ups or maintenance for a reduced price and it's not much more than a chance to sell you something and you paid them for the privilege of doing so. A true maintenance check will inspect their indoor coil and fan, look over the duct system for obvious leakage (not sizing), blow the drain lines out, check refrigerant levels (not psi, superheat and subcool dependent on the metering device type), check the microfarads of the capacitors, check the contactors points, check amp load and starting abilities and lastly fully wash the condenser until the coil flushes clean. That last one is the most time consuming and rarely done right. I'd bet your system has a filthy condenser coil and is likely low on refrigerant due to my experience with that vintage of system, and I have a lot of experience with that vintage/brand.
Your temperature drop across the coil is a piss poor way of gauging your systems health and quite frankly is extremely easy to manipulate. Never trust anyone that uses the delta as more than a reference point. I promise you for $100 I can get you a 5degree improvement on your delta and it won't solve your issues. "15 degree delta and your units working great!" I've heard that my entire life. I can assure you I've seen plenty of units with amazing deltas that weren't keeping their owners happy.
Your air conditioner is a system. It's not just a coil and a condenser. SEER is a meaningless buzzword made up by the government to make you think you're getting something better. Some claim that SEER degrades over time but they have no way of actually proving it. For example: You bought a 12 SEER in 2003 thinking it was a middle of the road unit, the sticker said 12 SEER, the invoice said 12 SEER and you thought you got a 12 SEER. The problem is that unit is a 12 SEER IN A LABORATORY!!!!! I bet that bad boy wasn't a 10 SEER the day you first turned it on. What is a SEER anyway? Can you show me one? Can you prove to me with documentation that a snake oil actually improves my SEER rating? No. I can assure you if a manufacturer could gain a few SEER points by adding an additive it would come standard. Buyer beware, you're not getting what you think you are. I'd be glad to help you with your issues once it warms up, it's too cold right now to properly service any air conditioner.
AgAcGuy12
Simmer down just a bit , use more Paragraphs