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993 Driver
Join Date: Nov 2009
Location: Michigan
Posts: 35
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944 S2 Inconsistent cabin heat.
I am a new 944 owner and will be spending alot more time here now...I usually spend time with the 993 owners on RL...so I will have a great deal of ignorance on this new car.
The heater works, but seems weak at times...especially when very cold outside. When it finally warms up the air coming out of the floor and vents is inconsistent...and fluctuates between very hot and cool. Small adjustments to the temp knob yeild big changes in temps. Heater control valve? Air in coolant? The air direction "flap"? Thanks in advance for any help. I will have new topics to post for help as soon as I get this one worked out...jeeez...old Porsches are fun! 
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1992 964 1996 993 sold 2002 911 Turbo sold 2006 Cayman S sold 1982 SC sold |
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03-12-2012, 06:08 PM
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I have always had heat issues, in both my 944 and 924S. In both cases it was always too hot, basically the valve never closed. IMO climate control on these cars is more of a dream than a reality. The older you go the worse it gets. Im sure your 993 is nice, how much do you drive in the cold. I have found that some times its not worth fixing if the car is only used in warm weather.
I know these systems had vacuum involved in heat control you may want to check your vacuum system for leaks. Regards Dave
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'78 911SC Targa (Back In Action!) '00 996 Carrera (New kid on the block) '87 944 (college DD - SOLD) '88 924s (high school DD - Gone to a better home) |
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03-12-2012, 09:52 PM
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Garage Helper
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1.) Check also the heater control valve (Under hood near firewall).
2.) There is a small round grill in the center if the dash, and connected to that is a rubber tube that leads back to the cabin temp control/sensor - This sensor can be bad also. 3.) The electronic temp control unit in center of dash may be faulty (The one with the knobs and sliders that operates the heating and cooling).
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now).  UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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03-13-2012, 09:14 AM
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Quote:
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03-13-2012, 02:56 PM
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Garage Helper
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thanks - should have remembered that
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now). UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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03-13-2012, 04:08 PM
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Garage Helper
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There is also another annoying problem to often fix with our heating systems. The small clips that hold the control rods.
See here: 944 Heater Fix
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now). UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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03-13-2012, 04:23 PM
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Registered
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The heater fix worked on mine.
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Chris from NC ------------------- 86 944 covid19 Project 90 944 S2 Cab - triple black 66 mustang |
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03-19-2012, 05:20 PM
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ORACLE
948
OG 948
COVID19 Project
