Heat / AC Problem C230 97 - PeachParts Mercedes-Benz Forum

jetonetv · #1 05-26-2013, 01:53 AM

Hi I have been trying to fix these problems since I will be trying to get the paint and body work finished but wanted to get the Heat and AC Problem fixed.

The car does blow cold air at this point. So far I have did the following.

1. Had the "Heater Core" Replaced.
2. Had the "Thermostat" Replaced.
3. Had a "AC Compressor" installed/Replaced. (No feon was added to the car since I was told by a local AC shop that there was a leak by the Firewall area, close to the driver side corner.)
4. Had the "AC High/Low Switch" Replaced, (At the time I had no idea it was missing when I got the car back from a stupid mechanic.)
5. Had the "Receiver Drier/Accumulator" Replaced.

NOTE: I have bought a "AC & Heater Control Valve" have not installed it on the car as of yet.

The car does not overheat to my knowledge, after installing the new thermostat, it appears to be staying at "87-F".

I have did a diagnostic by watching a YouTube video, these are the following results of the test.

1. 73 F - Temp Inside Car.
2. 63 F - Temp Outside Car.
3. 71 F - Heater Core Temp.
5. 71 F - Evap Temp.
6. 204 - Coolant Temp.
7. LO (Like I said I have not added feon to this car at all.) - Bars of Pressure.
8. 107 - Refrigerant Temp.
9. 50 F - (The guy in the video on YouTube said it's not used on his model so I don't know.)
10. 165 - Blower Motor Volts.
20. 00 - Aux Fan
21. 080 - RPMs
22. 000 - Car Speed
23. 100% - Diagnostic Pin Volts
24. 12.9/13.0 - Battery/Alt. Volts
40. 02 - Software ver.
41. 03 - Hardware ver.
42. 18 - Variant Code
43. 6-C - Ver. Code ???
50. 71 F - (The guy in the video on YouTube said it's not used on his model so I don't know.)
51. HI - (The guy in the video on YouTube said it's not used on his model so I don't know.)
52. 50 F - (The guy in the video on YouTube said it's not used on his model so I don't know.)
54. OFF - Emergency NOT ENABLED. (What was said on the YouTube video.)

Well I tried to provide the most information possible.

I hope someone out there could help.. thank you.

Gilly · #2 05-26-2013, 06:28 PM

Not sure, other than the codes listed, what the problem is.

You say it blows cold air, so we can assume the blower motor is working.

You say it blows cold air, now normally I assume you mean like 40 degree cold air on AC, yet you say there is no freon (note the "R" in freon), so you mean there is no heat? Do you get only cold air when you are trying to get heat?

Need to maybe start with the basics. Where did the stupid mechanic come in to play, was he trying to fix something and instead charged you money to be stupid? Was the car in an accident and things only got worse?

If all this work was done including replacing the heater core, and now it also needs an evaporator, man you are going to be really mad.

jetonetv · #3 05-27-2013, 06:39 AM

Quote:

Originally Posted by Gilly

Not sure, other than the codes listed, what the problem is.

You say it blows cold air, so we can assume the blower motor is working.

You say it blows cold air, now normally I assume you mean like 40 degree cold air on AC, yet you say there is no freon (note the "R" in freon), so you mean there is no heat? Do you get only cold air when you are trying to get heat?

Need to maybe start with the basics. Where did the stupid mechanic come in to play, was he trying to fix something and instead charged you money to be stupid? Was the car in an accident and things only got worse?

If all this work was done including replacing the heater core, and now it also needs an evaporator, man you are going to be really mad.

The mechanic that the car was at was suppose to fix the ac / heat. Which I was told was the heater core & ac compressor. The thing is he installed the ac compressor very quickly along with some other parts.. but when he asked about doing the heater core job I said I don't have the part yet. He said he would do it for $200 The offer to me was a deal.. but after months and months went by I got pissed at the guy and did not pay him a dime for the work even tho he did finish the job by installing the ac compressor and heater core.

When I bought the car it was damaged, (only by the front driver side fender). I have been working on getting the body and paint later on.. but so far can't complain for the price I bought the car for ($700). The car to my knowledge never had working ac or heat when I got it.

The ac compressor is new so I know there is no freon.

If I turn the cars ac control to HI (heat) it just blows cold air.) If on LO (Cold) same of course this does change upon weather conditions. I have not figured this out yet to confirm.

Gilly · #4 05-27-2013, 03:45 PM

So the work was all done including the heater core? Car is now driveable?

I would start with basics first, if there is no heat, the first thing I would ask you is if the engine temp gauge is getting up into the middle range (normal operating temp) and if the coolant tank is full, because if the coolant is low you won't get good heat.

If there is no freon then the AC won't work, so can't really tell if the system is working or not without a freon charge in it, so need to get the system tested for freon leaks first, then charge the system and go from there.

jetonetv · #5 05-27-2013, 08:46 PM

Quote:

Originally Posted by Gilly

So the work was all done including the heater core? Car is now driveable?

I would start with basics first, if there is no heat, the first thing I would ask you is if the engine temp gauge is getting up into the middle range (normal operating temp) and if the coolant tank is full, because if the coolant is low you won't get good heat.

If there is no freon then the AC won't work, so can't really tell if the system is working or not without a freon charge in it, so need to get the system tested for freon leaks first, then charge the system and go from there.

The car was always able to drive, it runs perfectly fine.

NOTE: In upon explaining I did post the engine gauge temp. "The car does not overheat to my knowledge, after installing the new thermostat, it appears to be staying at "87-F" (Basically in the middle range.)

The coolant tank is full (I'm guessing because when my dad installed the thermostat, the car was asking for coolant, (obviously because the lost of coolant.) so I added coolant to the tank and the light went away.

The "AC Compressor does not engage, (obviously because no freon.

) but I'm trying to find a local trustful shop that can check this all out.. without killing the pocket..

, it's also hard because of my working times 6 days out the week off on a sunday.

I was assuming my last option is the "Duo Valve" (Heater Control Valve) which I did purchase this part, I have no idea how to remove the old one from the car and replace it.

Gilly · #6 05-27-2013, 09:50 PM

Yes, see if the coolant lines running to the heater valve are warm on both sides of the valve with the heat turned all the way up.
It is also possible there is air trapped in the heater core but if you have been driving it a lot it should have burped out by now.
You will lose some coolant in removing the hoses but otherwise it should be as easy to replace as it looks.

jetonetv · #7 06-07-2013, 02:40 AM

Here is the scanned document of the report from the benz shop.

http://i.imgur.com/ORlvsim.jpg

(Not going to post the actual picture to big.

well $1,099.96

just my luck I guess... now where to go from this... unless there is some other benz shops that can say otherwise..

(The 1st one for $476.50, this includes installing the "Heater Control Valve & Aux Water Pump", which is parts that I already have.)

Let me know "Gilly".

Gilly · #8 06-07-2013, 08:23 AM

Looks OK on the AC work, you didn't mention the cruise work. I think I need to see page 2, not seeing the heater diagnosis. Does my comment make sense to you about doing the AC work now and the heater work later, or isn't the heater a concern at all in California? It is in Wisconsin!

I don't know if you just have a lot smaller budget than $1000?? You can price it out I guess if you think this is too high, seems reasonable to me, the dealer would probably be $500 higher than that I would guess.

jetonetv · #9 06-07-2013, 06:28 PM

Well your correct about saying that "AC" is needed in CA at this time, (Heat is not a much concern at this time, considering the current weather.) But it is when it's cold outside at night, which is why I was concerned about both.

I do have another car with working AC and Heat which I do drive most of the time. (1996 Chevy Beretta.)

But It's not that it's my limit, it's just other issue's in the way

, really I didn't want to purchase the benz at the time.. the seller who I bought it from had it for $1500 at 1st. (remember the body was damaged..) I ended up leaving with it for $700 I did have to pay for the tags which was not much, I did put money into it so far already.. But I guess I was thinking of trying to get a new car... but I don't know.. I was looking at Dodge Avenger or Dodge Dart... but not that I don't like my Beretta or Benz..

I guess it all depends if the benz will work out... after the paint and work is all done...maybe then I would appreciate it more then I already do now..

Gilly · #10 06-07-2013, 10:47 PM

Well the C230 is one of my favorite MB's except of course for the more exotic types, SLs and like that, for a 4 door car I really like the C230 before they supercharged it, like yours.
You don't say what they want to just repair the heater, or at least not showing the invoice for it (page 2).
You can just keep driving the Chevy for now and repair the heater later and drive the MB when the weather isn't so hot.
You could repair everything and try to sell it at a profit?
Hard to tell where to go next, if you can't fix it yourself.

jetonetv · #11 07-15-2013, 05:55 PM

There was nothing on page 2.

Sorry it's been awhile since I wrote anything here..

I have dropped the car off at the benz shop today.

Worried about it..

Here is some pictures of the car how it currently looks.

http://i.imgur.com/uXFybaC.jpg

http://i.imgur.com/xjQ1v42.jpg

Thank You. Hoping that it will be fixed and working...