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Old 03-19-2012, 08:54 PM   #16
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Carrier Infinity Thermostat lost power - won't power up


Well hell, now the air coming out of the unit is mildly cool, not cold as it has been. Did the system lose its mind and do I need to go back into the advanced settings to turn on the 'cold' air somehow?

The day this thing quit working, it was spitting out very cold air. Now the air is only slightly cooler than ambient.
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Old 03-22-2012, 09:23 PM   #17
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Carrier Infinity Thermostat lost power - won't power up


Alright, now I'm pissed.

So it turns out there is a leak in my coil in the attic. The company who sold me the unit wants $680 for labor to replace it, though the coil itself is still under warranty. I have to dig up the paperwork, but the smarmy sales guy who sold it to me said that it had a 10-year "bumper to bumper" warranty, including parts and labor.

The unit is only four years old.

Is $680 in labor unreasonable? They originally quoted me $1500 for labor but I pitched a royal fit. I paid nearly $10k for the system in 2008.
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Old 03-23-2012, 04:25 AM   #18
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Carrier Infinity Thermostat lost power - won't power up


680 sounds cheap.
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Old 04-02-2013, 10:19 AM   #19
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Carrier Infinity Thermostat lost power - won't power up


I have the same problem with the dead thermostat. Happened 2 nights ago around 8 PM. Started troubleshooting and found no comm leds on any of the boards (outside, inside unit and baffle control boards). insdie unit board has amber led but no green comm. Checked and found 24vac getting to the board but not out to stat or outside board. Played around and started clicking the service disconnect switch on the inside unit and finally the comm led lite and everything worked fine for about 24 hours. Last night around 8 PM same thing. Did the same thing opened the inside unit up and after playing around for about 15 mins and clicking the cutoff swithc many times comm lit and woking fine. Also yes I checked the float cutoff and see not problems with them.

I did notice I have 24 vac on the D when it is not working if I ground my meter to the chassis but not to C. In other words when unit is goor I have 24 vac across C and D. when it is not I have 24 vac between chassis and D but not between C and D. All fuses are good or check good with a meter! any ideas? I am assuming the 8PM is just a coincidence? Any other checks I can make?

I did find this on this on the net. If or when it returns I will check some of that?? http://gpsinformation.info/joe/carri...leshooting.pdf

Any other suggestions? I guess the internal board could be bad??
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Old 04-02-2013, 10:26 AM   #20
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Carrier Infinity Thermostat lost power - won't power up


Also to original poster, concerning bad coil.

I had a bad coil as well. Original quote was for warranty coil changout about $750. I told them to order it but called around to 3 other dealers the next morning. All other quotes was for $400 to $480 max. Called my delaer back and raised a little and he did it for $500. I had one guy tell me Carrier had bought coils from India for a couple years and that was the junk coils that were failing. I wrote Carrier and they reimbursed me for the $500 it cost to replace the coil. I was impressed with Carrier for doing the right thing. My unit was installed around 2006 and coil went out around 2009 to 10 frame.
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Old 04-02-2013, 12:23 PM   #21
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Carrier Infinity Thermostat lost power - won't power up


Thanks Mamou. To me its not the screw up, its the recovery. Carrier sounds like a decent company that stands behind their products.
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Old 04-02-2013, 09:07 PM   #22
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Carrier Infinity Thermostat lost power - won't power up


I guess their mistake was going with cheap copper from India (that I think they corrected). But the bright side is they made good on it for me at least. I will buy Carrier again!

On the other note. I think I found the problem. Tonight at 6 PM the stat went dead. Started checking voltages and found I was not getting voltage through the 2 float switches on my unit. I have one in the pan(it was dry) and one in the discharge pipe. I pulled the little cap off and a little water spilled. It was full and plugged somewhere. I think before I was not noticing the unit was down until the water had a little while to drain then it would work again. Crossing my fingers but I think this was the problem.

Thanks to DIY for having this forum for us DIY guys. And thanks to the experts that come around to help!!

Last edited by Mamou; 04-02-2013 at 09:09 PM.
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Old 08-05-2013, 12:02 PM   #23
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Carrier Infinity Thermostat lost power - won't power up


I had this same issue with my Carrier Infinity system, which suddenly shut of one day. My situation turned out to be exactly the same as The Raddish's initially was, so thanks for posting about it. The emergency drain pan underneath the unit was full and had shut off the system. After removing the side panel and looking inside, the internal drain pan was full too and had clogged. Someone left the installation instruction sheet in there when the unit was put in and it had slowly collected enough dirt to stop the water from flowing at all.

I've never worked on an A/C system before, but this was really easy to open, clean, and get working again on my own.
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Old 08-05-2013, 07:57 PM   #24
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Carrier Infinity Thermostat lost power - won't power up


Quote:
Originally Posted by The Raddish View Post
........but the smarmy sales guy who sold it to me said that it had a 10-year "bumper to bumper" warranty, including parts and labor.

The unit is only four years old.
If you have a 10 year labor warranty (which most of the high-end Cariier Infinity dealers offer) then you shouldn't pay a penny. Do you have the original estimate/invoice/receipt with this stated on it?

Failing that, $680-up to change out a coil is pretty typical (and $10,000 is fairly typical for the top of the line Infinity setup).

Last edited by sktn77a; 08-05-2013 at 07:59 PM.
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