Main Menu

Heating and Ventilation

Defroster Screeching Noise

When engaging the defroster handles next to the parking break I often get a loud obnoxious screeching noise.

Usually louder when engaging the left one, closest to drivers seat.

Where do I locate the footwell blowers to lubricate or??

Thanks in advance for your direction, be safe!

Bruce F. Simon

Air conditioning 1985 911 inop. Need help with troubleshooting

Need help troubleshooting shooting.  Fan does not blow air and the compressor does not engage.  

1986 Porsche 911 AC Issues

 I had a schrader valve leak and slowly lost R12 to the point the AC was barely cooling. I fixed the leakage problem and at this time was at the point I was not going to put R12 back in for several reasons: cost, environmental and ease of obtaining it today. I have read a lot about a R12 replacement using hydrocarbon refrigerant called Enviro-Safe which cost about $5/can. I won't debate the pros and cons about using this refrigerant, only that it works.

Having problems with my AC. Works great for a little while then slowly starts warming up closer to ambient.

My ​AC has been lsess than optimal for quite a while. The system has been recharged but it still does not work reliably.  As an example, with an ambient temp of ~85 degrees, turning the air on will bring temp from the vent down to about 40 degrees.  Very nice.  After a while of driving in sunlight the vent air  temp starts creeping up sometimes as high as 70 degrees.  If you park the car for a while then try the AC again the process repeaats.  It can't seem to hold that low temp very long.  Thoughts?




ccu Removal

Model: RS America, Year:1993, Mileage:63K, Type of use:Street use only
I have a 1993 RS America w/o AC and have determined that the CCU needs to be repaired due to draining the battery (55 mA drain). I have the removal wires but cannot get the unit out. It has been out before so it's not being held by a harness, etc. What is the technique?Thanks,

CCU Fan replacement

Model: c2, Year:1990, Mileage:101100, Type of use:Both Street & Track
CCU fan making noise. Any suggestions on extending life of current fan before needing to replace fan. Was emailed a quote from porsche dealer today. $310 for part. I did just replace a failed rear blower motor last week.

fresh air fan

Model: carrera, Year:1987, Mileage:114000, Type of use:Street use only
The fresh air fan does not work BUT when putting 12V directly to the fan it DOES work ok.Fuse and relay are okTried to check switch in middle console but could not get at itFunnily the same problem exists with the AC blower which after all has a separate switch in the console.I can't believe both switches are bad....strange! Prior owner was of no help.Any ideas?

Heater Control unit

Model: 911 RS America, Year:1993, Mileage:61K, Type of use:Both Street & Track
Car does not have A/C. The heater control unit is apparently causing the blower fan in the engine compartment to run unexepctedly and when the engine is cold. It turned on during the night and ran the battery down. I have heard stories of poor repairs by some companies and was quoted $675 to repair by one. Since I live in FL and the car does not have AC, is there a way to wire aroung the control unit? I don't need heat either.Thanks,

Remove rear A/C Condenser

Model: 911 Carrera, Year:1985, Mileage:133000, Type of use:Street use only
I want to add an original version of a rear spoiler to my car. What steps do I need to take to remove (and replace) the rear A/C Condenser?

Complete AC replacement

Model: Targa, Year:1989, Mileage:90000, Type of use:Street use only
I'm looking at buying an '89 Targa with 90K miles on it, pending inspection. The owner removed the entire A/C unit, including all of the tubes and hoses. I'd like to get it back working again, but am not in a rush to do so. How expensive will that change be if I want to do it today? Is it significantly less if I look for used parts over time?


Subscribe to RSS - Heating and Ventilation