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Old 07-12-2011, 06:18 PM   #1
DKS
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3 ton heat pump split 10 seer


have a unit that one day it runs fine,and then later it doesn't. pressures are 70/250 new filter.unit was low and injected w dye found signs of dye near acess ports but nothing confirmed weather it was blow bk from disconnection or leaking? i'm thinking maybe limit switch .don't know alot on cycles of a heat pumps,do they go into defrost during summer?

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Old 07-12-2011, 09:01 PM   #2
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3 ton heat pump split 10 seer


No defrost in the cooling mode. High pressure switch trips around 400 psi so 250 shouldn't be an issue. Subcool and super heat checked to confirm charge and txv operation? Capacitor checked? Amps checked on condensor fan motor? Float switch on the condensate line or pump? Intermittent problems stink!

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Old 07-13-2011, 10:15 AM   #3
DKS
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3 ton heat pump split 10 seer


Yeah it makes for a long day on a roof when it won't show it's evil side. Just got to baby sit til it does,i guess. Will post what i find later
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