swathdiver
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I missed the overheat part somehow! If this happened after the heater core replacement, definitely take it back and have them check their work.
A/C snowflake flashing after powering down due to blown coolant line and over - heating
- Thread starter intothewoodsigo
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- a/c air conditioning safe mode
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intothewoodsigo
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It was the line that was replaced...I have an appt so hopefully an easy fix.
have all the dtc cleared just incase. I thru a belt on my c6 at the track and didn't notice till the car freaked out, said stuff on the dash like that. after putting the belt on and refilling. I borrowed a scanner and there was a few codes dealing with over heating. reduce power., ac stuff like that. I cleared them all and everything worked.
the reset ac post you probably saw was one I found searching once. my wife was driving and said she couldn't use the ac cause it just flashed at her 3 times everytime she tried to turn it on. lucky for me it worked after cycling the key off and back on. but I did search here.
the fix for most people seemed to be take the battery cables off, wait about 5 mins. and then touch the two cables to each other for a bit, that will fully drain any remaining power stored in any caps in the system. then hook them back up. I think you wait a certain amount of time, or click the key forward but don't start it for a bit? something like that. if you Google tahoe flashing ac button it comes up and directs you to posts on this site if I'm remembering correctly.
the reset ac post you probably saw was one I found searching once. my wife was driving and said she couldn't use the ac cause it just flashed at her 3 times everytime she tried to turn it on. lucky for me it worked after cycling the key off and back on. but I did search here.
the fix for most people seemed to be take the battery cables off, wait about 5 mins. and then touch the two cables to each other for a bit, that will fully drain any remaining power stored in any caps in the system. then hook them back up. I think you wait a certain amount of time, or click the key forward but don't start it for a bit? something like that. if you Google tahoe flashing ac button it comes up and directs you to posts on this site if I'm remembering correctly.
A/C light blinks 3 times and won't engage or turn on
Need some help. My battery died two days ago, and I replaced the battery, ever since my A/C won't engage or turn on. A/C was working before dead battery I have a 00 GMC Yukon XL SLT with automatic climate control with rear climate control. I have removed all the HVAC &AC fuses and relay's...
www.tahoeyukonforum.com
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intothewoodsigo
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Went through the computer systems with my mechanic today and it's showing very low pressure for the ac system so likely a fluke it has issues after the overheat lol.. thanks for the advice, he's going to try and track down what is likely a leak and get it fixed up for me next week.
Thanks for following up!
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intothewoodsigo
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I'm a but worried about how pricey of a fix it may be but with three rotties and 2 kids going on adventures in the summer I really appreciated my Cold AC.. has anyone had any luck with with the sealant and top up kits??
The most likely source of a leak on these is in the Schrader valves in the high and low pressure service ports. Super simple to check for a leak (just remove the black plastic caps and spray with soapy water, as long as there is still pressure in the system). If a leak is found, the shop will properly evacuate the system, replace the valves, draw down a vacuum, and recharge it with the right amount of r134a, by weight. Shouldn't be more than $200 total.
In fact, if you have the system serviced at all, ask them to replace those Schrader valves before they do it.
