Question about Heating & Cooling
The unit is new- has been check by techs and everything appears to be fine
Please info on exact conditions...cooling, heating, what other techs did, etc. the more the best!!
Posted on Nov 15, 2014
Testimonial: "this happens in the heating mode- it is a 3/4ton unit, fujitsu halycson with a total of 4 indoor units....two floor units, two wall 37000 btu total the said air was I the lines and over charged- removed refrig, pressure checked and added refrig to specification. the compressor still frosts over at temps below 34,defrosts numerous times. techs said fujitsu advised possible over bend in copper line in a floor unit the system works great at temps above 36"
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Posted on Jan 02, 2017
SOURCE: Duo Therm AC not working
If unit was freezing up the air flow would normally stop, until the unit is turned off and allowed to thaw. I suspect evaporator blower may have a worn out belt, or compressor is shutting off due to control or internal overheat. What is the age of the unit?
Posted on Aug 07, 2008
SOURCE: Fujitsu ASU12C1 is freezing up
unit is freezing up because it either has too much freon or not enough. the pressure should be checked on both the low and high sides and corrected.
Posted on Jun 18, 2009
If anything, it appears undercharged. Purging is not recommended. @90 degrees the high side corresponding pressure is 168.4 and Low side coresponding numbers re70psi/68degrees. With all due respect to the tech I think . If your room temp is 80, the corresponding high aide pressure is 143.6 , Low side 85 psi Yup, undercharged. Now do me a favor and don't start any "but he said" wars going. If anything, Just call him back and tell him something is still not right. Ask him to bring you a pocket rergerence for temp/pressure relationships. The numbers I gave you are for R-22 which is commonly used in residential applications. Well, good luck and keep your cool. IDon't purge. R-22 is very expensive asis everything else. You may want to dispute anny additional service call charges. Good Luck
Posted on Aug 22, 2009
With ambient air temperature@ 65 with R12 Pressure should be 63.8 psi
Discharge air should be approximately 10 to 20 dgrees cooler than ambient. @ 70 degrees ambient the pressure70.2 -R-12. It is unlawful to discharge freon into the atmosphere. a 2500.00 reward is good incentive for someone reporting such release. Call the tech back and have him correct it. Good luck, Ned If he blows it into the air. A 2500.00 picture will help train him in compliance and overfilling a system. Good Luck.
Posted on Sep 29, 2009
Without knowing what the problem was with the old board, you're not going to be able to figure much out, I don't think.
Did you check that temperature sensor I mentioned? You will have to pull the top off to get access to it. Normally found connected to one of the tubes for the coil, silver in color, with 2 wires connected to it, near the bottom of the base of the unit.
Posted on Dec 13, 2009
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