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#1
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Heating And Ac On At Same Time
I replaced the expansion valve and dryer and recharged the system with R12. It is working perfect. When the control is on full heat, the compressor is on and running. There is cold air being delivered to the back seat vent and hot air to the front vents. When in max cooling mode all vents (center vents excluded, probably bad) deliver cold air. The only pod that I know is good, is the one at the driver side kick panel. It will stay operated with a mighty vac connected to it. I have been looking at the posts concerning w126 vaccuum pods and have not seen anything describing heat and air on at same time. Could this be a climate controller unit problem? I will keep searching the archives. I hope someone can take a short cut to the trouble. Car is a 1989 560sel. Thanks
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#2
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Unless you choose the EC button the compressor will run no matter what the temperature is that you select. One of the points for doing this is to be able to obtain dehumidified air even when it is being heated.
normal action of the climate controller will shut the center ducts when the temp chosen has warm air being distributed.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
#3
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By the way, the rear vent will supply only fresh air OR a/c!
There are heater ducts under each of the front seats for HEAT to the rear.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator Last edited by mbdoc; 04-07-2008 at 09:21 AM. |
#4
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No air conditioned air to the backseat, MBDoc?
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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century OBK #55 1998 Lincoln Continental - Sold Max 1984 300TD 285,000 miles - Sold The Dee8gonator 1987 560SEC 196,000 miles - Sold Orgasmatron - 2006 CLS500 90,000 miles 2002 C320 Wagon 122,000 miles 2016 AMG GTS 12,000 miles |
#5
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There is no cold air from center vents when the system is set to max cooling. From reading the archives, I think I am in for more for more work. Thanks Topgun
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