72-CLASSIC_RIDE Posted May 10, 2017 Share Posted May 10, 2017 No sure this is the correct Forum but here is my question. My A/C no longer cools with the cold air stopping at the POV valve (does not cool beyond POV Shrader Valve) going into Cabin side. My A/C Guy informed me there was a Kit that replaces POV & Expansion Valve that would make the A.C a lot simpler and also to work on. I informed him it is & has been my goal to maintain as close to Stock as practical so while the part(s) may not be NOS, but OEM Replacement works just fine for me. I was informed by my A/C Guy the POV Valve needs replaced and also should change Expansion Valve at same time. My Blower Motor does not seem to me to produce significant volume when high speed selector fan switch engaged. May need a new High Speed Blower Fan Relay as well. I will jump from battery to switch and check if Fan Motor increases significantly with Jumper. If so, likely the Relay and if not, probably the Blower Motor. (The A/C ducting inside the Cabin has been resealed when the Dash was removed several years ago so sure it's not a result of air escaping before it reaches cabin ducts). I have seen the POV & Expansion Valves on eBAY but do not necessarily trust them to be accurate................................... So, I am looking for 1) Correct POV Valve for a 72 Monte 2) Correct Expansion Valve for same 3) Correct High Speed Blower Relay (maybe) 4) Blower Motor (maybe) Is there anything special I should know when purchasing any of these items? I wanted to hear about others experiences and any tips before I go further as I am not versed on the A/C. My A/C guy is going to also look and we will compare notes prior to purchase of parts or before doing any work. Just want to ensure I am getting what I need the 1st time and avoid any problems. So any advise, suggestions, part suppliers etc. will really help me putting this back into operation. P.S A/C is Factory less R134 Conversion Much appreciated......................... Doug Link to comment Share on other sites More sharing options...
72-CLASSIC_RIDE Posted May 11, 2017 Author Share Posted May 11, 2017 Okay, I have found the POA, Expansion Valve, Heater Fan Motor on OPGI (shudder) & the Fan Relay elsewhere. POA Valve Kit https://www.opgi.com/monte-carlo/1972/cooling-heating/air-conditioning/CH28459/ Expansion Valve https://www.opgi.com/monte-carlo/1972/cooling-heating/air-conditioning/CH26778/ Heater Fan (Says both Non & A/C)? https://www.opgi.com/monte-carlo/1972/cooling-heating/heater-blower-motors/C210219/ Thanx, Doug I am hesitant to buy parts on line when I can't say for sure it's the right part. So should anyone who looks at the parts see's any reason why any won't work, please advise. Been around long enough to know not always true. Thanx Much, Doug Link to comment Share on other sites More sharing options...
cbolt Posted May 11, 2017 Share Posted May 11, 2017 Can you hear the motor change speeds as you select all three speeds? If so your relay is working fine. If im not mistaken, on high the resistors are bypassed and the motor gets the full voltage, otherwise the speeds are reduced by the resistors. If that is working okay your relay and motor are working fine. I corrected an air volume problem by reattaching the slip tube that connects the plenum to the drivers side hard plastic vent tube. That slip tube can slide loose causing your issue. If you pop the dash pad off you can see if the slip tube is attached correctly or not. Just something to check before you buy parts you don't need Link to comment Share on other sites More sharing options...
420ponies Posted May 11, 2017 Share Posted May 11, 2017 I wonder if they have this stuff "in stock" . I'd to see you not get this stuff and be waiting a long time for it. I 'm thinking of getting mine back into shape. I have a new Dryer and have replaced all the o-rings so far, just not the P.O.A. valve yet. New compresser and condenser back in 2010., just have'nt messed with it since then. Link to comment Share on other sites More sharing options...
72-CLASSIC_RIDE Posted May 11, 2017 Author Share Posted May 11, 2017 cbolt: I will try running a Jumper from the hot battery lead to the High Speed Relay. If Fan speed jumps, Relay is okay. I have had the ducting out and all resealed. The POA Valve is toast & recommended replacing Expansion Valve at same service. 420ponies: I have verified those things I need above are in stock currently, just not absolutely certain of fitment, even though they claim functionality & fitment in the Ad. While A/C guy is competent, just want to offer what ever assistance/guidance I can to further a successful repair. As the A/C was never a real concern and did work 10 years ago, In the course of time, the propellant would slowly seep out & needed to recharge each year. I pretty much ignored it once the Compressor had been changed out twice due to leaking. Last year I made an effort to get it into shape and with the help of the A.C guy, finally found me a New Compressor, installed it and propellant stays filled in system. The POA Valve just couldn't handle a working system I guess. So once again, hoping to get A/C working properly and maybe this time it will hold & want it to work well. Once understood, will advise on what it took to get A/C system to perform. Doug. Link to comment Share on other sites More sharing options...
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