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-   -   HVAC evaporator coil replacement. (https://www.thehulltruth.com/dockside-chat/1011176-hvac-evaporator-coil-replacement.html)

Godspeed 05-27-2019 04:21 PM

HVAC evaporator coil replacement.
 
How difficult is is to replace one? Mom had hers diagnosed and she needs a new one. Funds are tight and I'm wondering if this is something I could do. Any help would be appreciated.

Shipwreck1 05-27-2019 04:27 PM

Pretty tough. What kind of refrigerant?
how fast is leak?

Godspeed 05-27-2019 04:29 PM


Originally Posted by Shipwreck1 (Post 12566804)
Pretty tough. What kind of refrigerant?
how fast is leak?

Freeon (sp?) And fast

billinstuart 05-27-2019 04:30 PM

There is no AC stopleak,,,,

Godspeed 05-27-2019 04:31 PM

I have good mechanical skills just not in this area.

Godspeed 05-27-2019 04:32 PM


Originally Posted by billinstuart (Post 12566815)
There is no AC stopleak,,,,

Soooo...?

Shipwreck1 05-27-2019 04:51 PM


Originally Posted by Godspeed (Post 12566819)
Soooo...?

There actually is. It just doesn't work very well.

99yam40 05-27-2019 05:00 PM

you really need to have a vacuum pump to suck all of the old leftover refrigerant out and then put a Nitrogen pad on the system to keep O2 out while you cut the old one loose and use a torch to soder in a new one, then vac it back down before adding the exact correct amount of refrigerant back in.
not to mention the proper orifice or piston, or depending on you system the correct expansion valve.

these units now a days are not like the old 22 units where you just go by pressures

Godspeed 05-27-2019 05:10 PM

Thanks guys. It's a miller 3 ton. It came with her manufactured home in late 2014. I guess there's no warranty

99yam40 05-27-2019 05:16 PM

need to find the paper work she got with the home or who installed the A/C to see what the warranty says

baypro21 05-27-2019 05:39 PM

You need a recovery machine, storage tank, acetylene torch, nitrogen, vacuum pump, service gauges, refrigerant, mastic or mastic tape, and the know how to use all that stuff. I'm afraid it's a not a diy job.

Where in NC is mom?

Godspeed 05-27-2019 05:42 PM


Originally Posted by 99yam40 (Post 12566960)
need to find the paper work she got with the home or who installed the A/C to see what the warranty says

Apparently she didn't file the paperwork at the time of purchase so she has no warranty. The manufacture is closed today so I can't contact them.

Godspeed 05-27-2019 05:43 PM


Originally Posted by baypro21 (Post 12567034)
You need a recovery machine, storage tank, acetylene torch, nitrogen, vacuum pump, service gauges, refrigerant, mastic or mastic tape, and the know how to use all that stuff. I'm afraid it's a not a diy job.

Where in NC is mom?

Hampstead. I figured it wasn't, but she lost all her money in a scam from a fake military member. Sucks.

Shipwreck1 05-27-2019 05:46 PM

Is this a package unit? Is it a heat pump?
if it is a non heat pump package unit, they are pretty reasonable and you could probably swap it (buy entire new unit) out yourself with no special tools. They sale them at mobile home parts stores.

99yam40 05-27-2019 05:48 PM


Originally Posted by Godspeed (Post 12567046)
Apparently she didn't file the paperwork at the time of purchase so she has no warranty. The manufacture is closed today so I can't contact them.

only choice I can see is finding the best local A/C tech or company, and then asking if they could help with the warranty some how

TheRealMacGyver 05-27-2019 05:48 PM

This is becoming a more frequent problem with seer ratings trying to constantly outdo the latest. The aluminum has become paper thin to make them more efficient, but also more prone to leaks. When an evaporator goes, itís generally time for a replacement, at least on that side of the system. Remember when AC units lasted 20 years with no problems? Yeah, those days are over. Makes me want to start an HVAC business just typing about it!

Poorbastard 05-27-2019 05:49 PM


Originally Posted by Godspeed (Post 12567048)
Hampstead

is he positive itís an evap I would wanna pt that myself, might b fixable as long as itís not in the tube sheet .

99yam40 05-27-2019 07:16 PM

I moved into this house in 1979, that A/C ran without leaks for 30 years.
fins fell off , fan motors failed, drain pans rusted thru, but no leaks
new one leaked in 11 years


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