Hi guys,
First post so I apologize if this gets posted in the wrong section. Anyways, I purchased my 1989 325is back in February after 3 long years of searching with a few small issues one of which being the A/C does not work. I thought that I could just live with it for a while and "just recharge it" when summer comes. Haha nope.
With it being July now and wanting cold air, research is pointing me to just overhaul the system and get it converted to r134a so all the o-rings, dryer, pressure switch, expansion valve, possibly condenser, etc. would be replaced like in the r134a conversion posts on this forum unless if there is some other better refrigerant/option.
Before I dive into this possible conversion however, I wanted to check if the compressor (model Denso 10P15E) clutch functioned. I knew the system was not working because the system pressure is too low so I bypassed the pressure switches thinking the clutch would kick in but got nothing. I checked the voltage there and wasn't getting any. Using one of the BMW electrical troubleshoot doc thingy, I traced it back to the Evaporator Temperature Regulator, jumped the connector there and got the clutch to kick on so the one issue lies there. If my research is correct, the temp regulator is connected to a thermometer and once the temp reaches 37 Fahrenheit, it turns the compressor clutch off to prevent evaporator icing.
How important is this system? Could evaporator ice be a big problem? If it's not necessary, I would rather not replace the regulator and probe because they are quite expensive. Is there a good way of bypassing it or is that a dumb idea?
Also, is the compressor I have r134a compatible? I am having a hard time confirming that. As for condensers, I know parallel flow condensers work better than our tube and fin but by how much will it decrease vent temp?
Sorry if this post became a bit long or topics in this post have already been beaten to death. I swear I did some searching . Thanks in advance for any advice.
First post so I apologize if this gets posted in the wrong section. Anyways, I purchased my 1989 325is back in February after 3 long years of searching with a few small issues one of which being the A/C does not work. I thought that I could just live with it for a while and "just recharge it" when summer comes. Haha nope.
With it being July now and wanting cold air, research is pointing me to just overhaul the system and get it converted to r134a so all the o-rings, dryer, pressure switch, expansion valve, possibly condenser, etc. would be replaced like in the r134a conversion posts on this forum unless if there is some other better refrigerant/option.
Before I dive into this possible conversion however, I wanted to check if the compressor (model Denso 10P15E) clutch functioned. I knew the system was not working because the system pressure is too low so I bypassed the pressure switches thinking the clutch would kick in but got nothing. I checked the voltage there and wasn't getting any. Using one of the BMW electrical troubleshoot doc thingy, I traced it back to the Evaporator Temperature Regulator, jumped the connector there and got the clutch to kick on so the one issue lies there. If my research is correct, the temp regulator is connected to a thermometer and once the temp reaches 37 Fahrenheit, it turns the compressor clutch off to prevent evaporator icing.
How important is this system? Could evaporator ice be a big problem? If it's not necessary, I would rather not replace the regulator and probe because they are quite expensive. Is there a good way of bypassing it or is that a dumb idea?
Also, is the compressor I have r134a compatible? I am having a hard time confirming that. As for condensers, I know parallel flow condensers work better than our tube and fin but by how much will it decrease vent temp?
Sorry if this post became a bit long or topics in this post have already been beaten to death. I swear I did some searching . Thanks in advance for any advice.
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