99 Town Car A/C help

[HZRDOS]

Can anyone help me with the location of the low pressure A/C port?

It would be a really big help, I need to add some 134a and need to find the right port.

Thanks,

Richard

[v8_dave]

Should be on the dryer (black large cylinder) if I remember correctly.

[98TC-Cartier]

Well the two ports are different sizes so you can only attach your can adapter to one place.

[HZRDOS]

Yeah that is what I thought. I noticed the A/C compressor would come on and off intermittently it seemed, wheh I turned on the A/C the pully on the compressor would spin for about 10 seconds, then cut off for about 10 seconds, it was really odd...is that normal? I would not think so but I do not know for sure.

[Shrewsbury]

Intermittent compressor operation is normal when you are low on refrigerant. There's a low pressure shut off switch on the accumulator/dryer that protects the compressor from overworking in this situation.

[HZRDOS]

OK - I added some refrigerant and at first the compressor would not come on at all.

After I added some is when it finally came on but would run intermittently. I quit adding the 134a because the guage read that the system was at just under 45psi. The instructions on the kit I bought said to stop adding at 45psi - should I still add more?:confused: It felt like I did not add much from the can - there was still plenty left.

Thanks for all the help so far :drink:

[98TC-Cartier]

What settings do you have the control unit on? Do you have a volt meter? You can easily use that to see where the power to the clutch is being cut off. Own a service manual, if not d/l from www.fordcds.com or buy on ebay for $5.

[LSRX101]

OK - I added some refrigerant and at first the compressor would not come on at all.

After I added some is when it finally came on but would run intermittently. I quit adding the 134a because the guage read that the system was at just under 45psi. The instructions on the kit I bought said to stop adding at 45psi - should I still add more?:confused: It felt like I did not add much from the can - there was still plenty left.

Thanks for all the help so far :drink:

You are still low on refrigerant. Ignore the useless instructions and more useless gauge.:rolleyes:
Add a few ounces of refrigerant at a time until the vent temps drop and the lines at the firewall are the same temperature. (doors open, blower on high, MAX ac setting, engine at ~1500rpm) That's as close as you will get without a proper gauge set. Stop charging as soon as soon as the lines are at the same temp or you risk overcharging it. There's no way to tell an overcharge without a high side gauge.
You will notice that the compressor will run longer as more refrigerant is added.
Good luck :drink:

[HZRDOS]

You are still low on refrigerant. Ignore the useless instructions and more useless gauge.:rolleyes:
Add a few ounces of refrigerant at a time until the vent temps drop and the lines at the firewall are the same temperature. (doors open, blower on high, MAX ac setting, engine at ~1500rpm) That's as close as you will get without a proper gauge set. Stop charging as soon as soon as the lines are at the same temp or you risk overcharging it. There's no way to tell an overcharge without a high side gauge.
You will notice that the compressor will run longer as more refrigerant is added.
Good luck :drink:

Awesome - thanks for the info. I used up the entire first can and it was running longer and longer - takes forever because it only adds it when the compressor kicks in...when it is not running - it barely adds any at all.

I need to get another can or two and keep adding some - the air actually got a little cooler....so I am getting somewhere..


Thanks again for the info - now I know when I can stop adding by the line temps :drink:

[w0by]

Sucks that a 99 has a A/C leak. Was it in an accident or something?

[LSRX101]

Sucks that a 99 has a A/C leak. Was it in an accident or something?

Why? It's 8, possibly even near 9, years old. Leaks can happen at that age. Just today I replaced a leaky evaporator on an '05 Chrysler minivan.

[w0by]

Was just wondering if there was a specific reason that it started to leak or something that's all.

[LSRX101]

Was just wondering if there was a specific reason that it started to leak or something that's all.

It's usually a bad o-ring at a hose fitting or a compressor shaft seal. That's usually what you'll find at that age.

[HZRDOS]

Was just wondering if there was a specific reason that it started to leak or something that's all.

No - no specific reason at all....but it is nice and cold now:)

The compressor finally started running continuously and she filled up nice - all nice and cold

[LSRX101]

Cool :cool::cool:
Just keep in mind that there is a leak in the system somewhere. It will get worse over time. If you just keep juicing it up you will introduce air into the system and cause problems.