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2010 FEH A/C tech.

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Old Aug 25, 2020 | 05:03 PM
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2010 FEH A/C tech.

A/C in the truck never worked, truck lives mostly in San Francisco so A/C functionality is rarely warranted, and was not even noticed.
Ford diagnosed as a damaged/leaking condenser and generously offered to replace the condenser for $1500 on top of the $200 diagnostic fee they wouldn't wave if work was done. For somewhere north of $1700.

Purchased Ford drier, condenser, POE oil, coolant for hybrid system, and spend about two hours putting it all together. I'm still under $300 spent on (ford)parts.

Does anyone know how much R134a the system needs?
I only see that the system requires 4.4oz of POE oil, but nothing on how many lbs of R134a should go into the system.
Going to go have a vacuum pulled to verify system integrity.
I know I could go by gauges, but I would like to have the amount the Hybrid system is designed to take. Most books only mention the conventional gas systems and not the electric hybrid one.

Also, anything else I should check while I'm at it before pulling a vacuum and refilling with refrigerant?

Thanks.
 
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Old Aug 26, 2020 | 08:55 PM
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Look for a sticker under the hood to verify the charge, but according to pro demand, it takes 2 lbs (0.91 kg).

Are you absolutely certain the oil you have is for an electric driven AC compressor? Ford’s recommendation is Motorcraft YN-32, so if the oil you have meets the same specs, you’re good to go. If it’s not the right oil, it can conduct electricity and short the AC compressor motor.
 
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Old Aug 31, 2020 | 03:08 AM
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Originally Posted by DBGrif91
Look for a sticker under the hood to verify the charge, but according to pro demand, it takes 2 lbs (0.91 kg).
Cleaned underhood better and saw other half of the sticker. Called for 2lbs of R134a. Not sure how I missed that part.
POE oil said it wasn't conductive, forgot the brand. POE oil was a debacle, checked online from Ford they wanted $100/ 1ozbottle. Went to the dealer, they wanted $150/oz. Figured I needed at least 3ozs, Two in the accumulator and one for the condenser. Googling didn't show me any better.
Today I rechecked and instantly find an '8oz' bottle for $45 bucks for YN-32, and another Ford 2oz bottle for $45. Volatile price changes?

Picked up a Pittsburg Vacuum Pump from HF along with a set of Pittsburg A/C gauges.
Pump was able to pull down to 29inHg initially. Disconnected everything and went for a drive.
Reconnected gauges, and it still indicated 29inHg, playing around with the gauges I partially opened the gauge to atmo and lost vacuum.
Stuck the pump back on and it seemed to pull down to 30inHg this time. Hoping the gauges are accurate.

With everything assembled and low side gauge opened It pulled in 24oz(1.5lbs) of R134a no problem. A bit terrifying as the Hybrid Drier has two connections right next to the Low-Side port, initially not sure if it was just the gas going past the valve making noise or if there was a leak at the connections.

25-30PSI on the low side and 150psi max on the highside with an outside temp of 64°F. It's San Francisco, a hot day is high 70s°F
Looked around the various sites I could find and this seems correct. Pencil thermometer in dash vents was showing 40°F.
Drove around retested and everything is still within spec.

I don't want to overcharge the system, by the gauges everything is correct. But I only put in 1.5lbs of R134a. Still have another 12oz can of R134a.

With the engine off pressures on both sides equalize down to ~87psi.

I'm assuming everything is OK. I'll recheck next Thursday and make sure everything is still within spec.
 
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Old Aug 31, 2020 | 12:08 PM
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As long as its getting down to at least 29 in*Hg, and you’re vacuuming for at least 30 minutes, you should be good - you’d need a more accurate gauge to tell how close it’s actually getting to 30 in*Hg.

The charge listed on the sticker is the maximum charge the system can hold. If it’s working on 1.5 lbs, leave well enough alone. You can always add the last can if need be.
 
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