| Author | Message | ||
| Michael N. (Man90tr)
Member Username: Man90tr Post Number: 695 Registered: 4-2001 |
Thanks Stanley. | ||
| Stanley DiGuiseppi (Standig)
Junior Member Username: Standig Post Number: 73 Registered: 5-2002 |
James is right Michael, just unplug the compressor it is now out of the picture. Remember your defroster will not work as well because it needs the a/c compressor to dry the air. So you will have to increase the heat like the old days and run the blower on a higher speed to clear windshield. | ||
| Michael N. (Man90tr)
Member Username: Man90tr Post Number: 694 Registered: 4-2001 |
Thanks James. I have not done it yet, so I have nothing to report. I have not had the courage yet to do it -- might never get it in fact. Plus the engine puts out enough heat that it warms the cabin well even at 50 degrees outside. Michael | ||
| James Selevan (Jselevan)
Junior Member Username: Jselevan Post Number: 167 Registered: 6-2002 |
Michael - your concern about running the compressor without freon is well founded. Steve's suggestion is correct in theory, but if I understand it correctly, you are relying on the pressure switch to prevent clutch activation. It might be simpler and safer to simply unplug the AC clutch wire at the compressor and tape it off until you recharge the system. My thoughts. Jim S. | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1117 Registered: 1-2001 |
Dave -- I really can't say with any certainty anything about 348 AC operation (I don't have the relevant wiring diagram). | ||
| Dave Penhale (Dapper)
Member Username: Dapper Post Number: 253 Registered: 4-2002 |
great description steve, would it be reasonable to assume the 348 system works in a similar way? | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1112 Registered: 1-2001 |
YMMV = your mileage may vary but I was using it as you deduced -- please proceed at your own risk. | ||
| Michael N. (Man90tr)
Member Username: Man90tr Post Number: 690 Registered: 4-2001 |
What does YMMV mean? Thanks Steve. No worries you will not be held responsible if I blow the system up. I believe in personal responsibility as I will be the one turning on the switch. | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1110 Registered: 1-2001 |
Shouldn't be much of a problem Michael. The heating side of things is fairly independent from the cooling operation on a TR. When you press an AC push button on the console: 1. vacuum is directed to the proper flaps to direct the air flow, 2. a ground signal is given to the blower system activating the blower (regardless of whether heating or cooling is called for), and 3. a ground signal is given to the AC ECU to activate it. The TR AC ECU then decides either to run the AC stuff (by activating the clutch on the AC compressor) or the heater stuff (by opening the hot water valve). In your case, if the AC ECU ever called for cooling, the ECU would try to put +12V on the AC compressor clutch, but nothing would happen as the low pressure refrigerant switch in series with clutch windings would be open. Your system might not hold as precise a cabin temperature and might overshoot to the warm a bit (since it won't be able to actively cool) but no components will suffer. JMOs so YMMV, etc. | ||
| Michael N. (Man90tr)
Member Username: Man90tr Post Number: 687 Registered: 4-2001 |
Guys, I have a question. One of my AC hoses developed a leak a while ago. Turned out to be a blessing in disguise. I have been driving the past 2 months with the window down and loving my exhaust note (no cats and precats) what a nice driving experience. I have had the hoses sitting here for 2 months but can't get myself to take the car in as I just keep driving it.  Ok, its getting colder here and now may need to use the heat in the mornings. My AC system has no freon or pressure in it but all the hoses are hooked up etc. What I would like to know is can I turn on the HVAC system and use the heat settings (75 degress) without harming the AC system in any way? Thank you for your help. Michael |