Little confused.

[garyw]

12 seer 2.5 ton reem w/ .065 piston a-coil. Suc pres=58 Head pres-185Outside temp 70, Suc temp = 35. Inside looked pretty dirty but seems to be good air flow. Any ideas?
Thanks

[doc havoc]

What's the problem? Those numbers don't look all that bad. What's your superheat, indoor temp, delta T?

[garyw]

I was conserned about the suc temp. Nearly freezing. Guess I need to get more info to anwer the other.

[BaldLoonie]

Mismatch! Rheem 12 SEER products are to be on a TXV coil and usually a notch larger than the 10 SEER coil. A full outdoor unit model # will tell but could be undersized indoors.

[garyw]

it is a 10seer 2.5 ton goodman coil (mismatch). I guess it's been running this way a while though unless its a leaker or something? You think the only good anwer is matched a-coil w/txv or just a txv?
Thanks

[smittyii]

is the evap coil an "M" style coil? in other words does it look like a double "A" coil?

[garyw]

no. regular A

[smittyii]

its definitely a mismatch. the good news is with a 13 seer rheem evap you should get way higher efficiency.

[BaldLoonie]

Undersized evap is probably running colder. Since you don't know the history, probably been running low suction and superheat, especially if getting dirty. In heat mode, probably running a high head too.