Quote:
Originally Posted by rpm5099
Wow, ok. I had already had my evaporator and condenser replaced, so it sounds like you did have a different problem. I'm surprised modifying the evaporator temperature reading made a difference at all with a blocked condenser, that's why I thought you were on the right track. I probably should have mentioned that you want to rule out restrictions in the system before going this route, but I guess at the end of the day you now have a way of making your A/C ice cold in the summer when you aren't worried about it icing up. Could be that I just have a drifting evap temperature sensor, but it never got very cold even with the previous evaporator and I would hope the new unit came with a new sensor (the one thing I did not do myself, was just too busy at the time).
I mentioned it in my original post but I probably should have called it out more directly - if you jumper that evap temp sensor with a 2kΩ resistor and the A/C goes from being coolish 55F to blasting ice cold air then your A/C is mechanically sound and the evap sensor is a potential culprit.
Glad you got it worked out!
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Thanks for all your help! To be honest, I really didn't think there was anything wrong with it based on what the shops kept telling me. The only way I found out about the condenser issues was taking it to a THIRD shop who immediately said you've got a restriction. So I had them replace the condenser (being the last part in the system yet to be replaced) and I couldn't believe how much cooler it was.
I am not sure about your evap temp sensor. I know on mine, when the shop replaced my evap core, they did not swap out the old sensor. I did that on my own since mine is an earlier model where it rides on a carrier instead of
attaching to the evap core fins.
I will say, even with a fully replaced system, the resistor still makes a difference. So far I haven't seen any issues with the 18k resistor as far as icing up, and it allows the compressor to run a little longer and drop down into the mid-low 40's. Without it, the compressor will shut off for long enough that the air temp will creep up to around 55-57 before coming back down with the compressor cycling.
Here's yesterday's vent temps with outside air of 88, humidity around 78% (very rainy here at the moment).
