House Air Conditioner Question

[JetBoatRich]

What causes it to freeze up the blower unit in the house :yuk:

[Mandelon]

Set too cold and high humidity?

[Ziggy]

Or maybe a bad evap temp sensor??

[riverroyal]

could be low on refrig

[JetBoatRich]

Set too cold and high humidity?
set at the mid 70's and humidity is 33% :rolleyes:

[Trailer Park Casanova]

Low freon usually, or bad expansion valve if you have one.
At your furnace/air handler, do you have a 1/4" copper line going in with a valve on it that looks like this:
http://www.hvacmechanic.com/images/txvalve.gif

[Ziggy]

or bad expansion valve .
Doesn't the Evap sensor connect to the exp. valve???? I wanna earn some brownie points too :D :D

[Trailer Park Casanova]

Doesn't the Evap sensor connect to the exp. valve???? I wanna earn some brownie points too :D :D
Yep, Zig, you're right on the money, and get a gold star next to your name too.

[riverroyal]

i need a new apprentice,you busy?

[JetBoatRich]

Low freon usually, or bad expansion valve if you have one.
At your furnace/air handler, do you have a 1/4" copper line going in with a valve on it that looks like this:
http://www.hvacmechanic.com/images/txvalve.gif
I have a line going into the furnace/air handler, it goes into the front and I do not see a valve :)

[Ziggy]

i need a new apprentice,you busy?
I hope to retire early...........so maybe :p
Learned alot by being around the techs, believe me, European cars DID NOT have good a/c in the 80's.........them Krauts just didn't understand it. :D

[Trailer Park Casanova]

Then if it looks like this:
http://www.hotboatpics.com/pics/data/500/3812cruise_2006_Royal_Carib_050-med.jpg
It's low freon, or a backed up drain line.
I'm free tomorrow, have gauges & freon and a wet vac to clear the drain,, will travel & work cheap = you have any beer in the fridge???

[Trailer Park Casanova]

I hope to retire early...........so maybe :p
Learned alot by being around the techs, believe me, European cars DID NOT have good a/c in the 80's.........them Krauts just didn't understand it. :D
Oh brother did I suffer with Kraut A/C.
Brutal.
But now,, they'd mastered A/C and convertable tops.
Kinda related don't ya think?

[JetBoatRich]

Hey Ross thanks.
I sent you a PM, beer always in the fridge :cool:

[Kilrtoy]

What causes it to freeze up the blower unit in the house :yuk:
Probably your post count :boxed: :boxed:
Sorry to hear this rich, not the time of year you want this to happen

[JB in so cal]

What causes it to freeze up the blower unit in the house :yuk:
I'd say your Wesley Sprocket was set too tight and you're gonna need a 8 sided gangly wrench to fix it.
Mee namu dogface in the banana patch. :p

[SmokinLowriderSS]

I used to work on 'em, but didn't pay as well as building airplanes, about 7 years.
Bad expansion valve MAYBE .... but not real likely.
Normally either low on refrigerant (causing the coil to drop below 40*F surface temp)
OR
Clogged filter preventing airflow from "heating" the coil to 40*F. There has to be enough airflow thru it to keep the refrigerant from cooling the coil TOO far, it's a "balance" thing.

[Trailer Park Casanova]

psig is the first colum!!
R-22 R-134A R-410A PSIG R-22 R-134A R-410A
0 -41 -15 -60 78 46 75 20
2 -37 -10 -58 80 48 76 21
4 -32 -5 -54 85 51 79 24
6 -28 -1 -50 90 54 82 26
8 -24 3 -46 95 56 85 29
10 -20 7 -42 100 59 88 32
12 -17 10 -39 105 62 90 34
14 -14 13 -36 110 64 93 36
16 -11 16 -33 115 67 96 39
18 -8 19 -30 120 69 98 41
20 -5 22 -28 125 72 100 43
22 -3 25 -26 130 74 103 45
24 0 27 -24 135 76 105 47
26 2 30 -20 140 78 107 49
28 5 32 -18 145 81 109 51
30 7 35 -16 150 83 112 53
32 9 37 -14 160 87 116 57
34 11 39 -12 170 91 120 60
36 13 41 -10 180 94 123 64
38 15 43 -8 190 98 127 67
40 17 45 -6 200 101 131 70
42 19 47 -4 210 105 134 73
44 21 49 -3 220 108 137 76
46 23 51 -2 225 110 139 78
48 24 52 0 235 113 142 80
50 26 54 1 245 116 145 83
52 28 56 3 255 119 148 85
54 29 57 4 265 121 151 88
56 31 59 6 275 124 153 90
58 32 60 7 285 127 155 92
60 34 62 8 295 130 158 95
62 35 64 10 305 133 161 97
64 37 65 11 325 137 167 101
66 38 66 13 355 144 173 108
68 40 68 14 375 148 177 112
70 41 69 15 405 155 182 118
72 42 71 16 500 173 202 134
74 44 72 17 600 N/A N/A 149
76 45 73 19 700 N/A N/A 159
This chart got squished in the cut and paste.
But if you line up the psig in the left colum,, then follow down the second colum which is the air temp through the coil with Freon 22,, you'll see as the pressure drops, the temp drops.
When you get below 58 lbs (suction),, then ya hit 32 degrees and in this very humid weather the moisture in the air will freeze on your coil.
You probably have the fixed metering device.
Make sure your air filter is super clean, drain line super clear and flowing.
A wet vac on the end of the drain helps clear it. If it has a vent on the drain, put your thumb over it when ya vac.
Chunks of insulation, filter material, dust bunnies,, algae can easily clog it up causing water to flow where ya don't want it that can be mistaken for iceing.

[Danhercules]

I had the same problem. I made sure all my vents were open and a clean filter. Never froze agian.

[blown65]

yup, usually its dirty filters.

[Trailer Park Casanova]

yup, usually its dirty filters.
or a clogged drain line, or low gas pressure.

[Boatcop]

Don't discount dirty coils. Dust or fur on the evap coils will retain moisture and lead to freeze up.
Also check the evap drain. If it's not draining and there's water in the pan, it may be causing too high humidity in the evap chamber.

[JetBoatRich]

Thanks for all the help/advice :cool:
I have a swamp cooler as well, so not a total loss when comes to cool air :rolleyes: glad we installed that last year :cool:
The water drains as it should, :rolleyes:
Ross See you Friday :cool: thanks again

[Trailer Park Casanova]

Might have to be late Saturday or Sunday if you're not home until after 5.

[JetBoatRich]

what ever works for you Ross, we will be home most of the weekend. Just call me and I let me know when :cool:

[Trailer Park Casanova]

Wifies massive, colossal yard sale Sat. Then I'm free.
We'll be setting it up Fri nite.
Baby furniture, nice, clean full size beds,, ect ect.

[BajaMike]

what ever works for you Ross, we will be home most of the weekend. Just call me and I let me know when :cool:
How cool is Ross???,,,,offering to come out on a weekend and all in this heat,,,,he's got to be Mr. :cool:
:rollside:
These guys,,,,are a tribute to Ross and his,,,,stories!:D
:rollside:

[OutCole'd]

I'd say your Wesley Sprocket was set too tight and you're gonna need a 8 sided gangly wrench to fix it.
Mee namu dogface in the banana patch. :p
LMAO!!!!!

[BajaMike]

couriousity ?? who is the little piece of ass in your signature picture ???? :rollside:
I've been wondering the same thing....can we get a blown up version of that pic???? Unless, of course it's Ross' gorgious daughter...... :cry:
:)

[Trailer Park Casanova]

couriousity ?? who is the little piece of ass in your signature picture ???? :rollside:
Our honeymoon at the Hard Rock Hotel.
Wife putting on mood music. The suite has several sound & video systems, 4 rooms.
They were cool. For $98 per nite they gave us the best suite in the Hotel when we mentioned we're getting married.
I was taking pics out the window with her POS Olympus camera, turned around and snapped this real quick. Grainy and blurry, the camera sux.
She's cool about posting it, she has butt floss on BTW.

[JB in so cal]

Our honeymoon at the Hard Rock Hotel.
Wife putting on mood music. The suite has several sound & video systems, 4 rooms.
They were cool. For $98 per nite they gave us the best suite in the Hotel when we mentioned we're getting married.
I was taking pics out the window with her POS Olympus camera, turned around and snapped this real quick. Grainy and blurry, the camera sux.
She's cool about posting it, she has butt floss on BTW.
...prolly not for long, me thinks :)

[Hal]

If you haven't had it serviced for years or changed your filter regularly its most likely a dirty filter or coil. Some people close off vents in unused rooms to try and get more air into some other part of the house. That's a no no. It will work ok in heating but don't do it in cooling. You want all the air flow you can get in cooling.
I have never seen a coil ice up because of a plugged drain line in my 40 years of service. The air side of the coil has to be around 32* for moisture to freeze to it and a plugged drain wont cause that. So if you have a plugged drain don't stop there because you have another problem.
For the air side to be 32* the inside of the coil has to be lower than that because you lose about 5* from heat transfer thru the copper. Your suction can run as low as 55 psig and your coil won't ice. Anything below 55 psig it will ice up. . A bad TXV is rare but it happens if you have one.
AIR FLOW make sure all the register are open.
If you start your unit and your getting plenty of air and its cooling ok and then your air flow starts dropping off in the first half hour to 45 mins you have a dirty coil. A dirty coil will let some air flow but once the lint,dust, dog hair or what ever gets wet from the condensation created on the coil it will just about stop all air flow and heat transfer and the coil will drop to below freezing.
LOW CHARGE make sure coil is clean before this test.
Start your unit and let it run for 5 to 10 mins. Go out side to the condensing unit and feel the larger of the 2 copper lines. It should be cold to the touch or a least cool. If it is cold your freon is ok. If it is warm then it is most likely low on charge or a resriction on the hi side.
Really need a lot more info to troubleshoot...but the above 2 problems are the cause of the coil icing up 90% of the time.

[Trailer Park Casanova]

We don't know if it's iced up or a drain problem Hal until I look at it this weekend.
All we know now is water is intermittantly coming outta the A coil.

[JetBoatRich]

Ross thanks for coming out and checking out m system :cool: hopefully you found the problem :rolleyes:
We enjoyed the conversation and cold beer together :rolleyes: you are a true class guy :cool:

[RitcheyRch]

What was wrong with it?

[a catered life]

ac in av wtf? :cool: the winds have been blowing for 4 days just open the windows and enjoy the fresh smell of the neighbors horse's ass blowing in the wind :rollside:

[JetBoatRich]

ac in av wtf? :cool: the winds have been blowing for 4 days just open the windows and enjoy the fresh smell of the neighbors horse's ass blowing in the wind :rollside:
The wind has been out of control the last few days :yuk:

[JetBoatRich]

What was wrong with it?
He found the unit low on freon, Ross filled it up, tested it and it seems to be OK :cool:
He pointed out a couple other issues I should check out, the hand held temperature gauge works great for checking all the vents :cool:

[RitcheyRch]

I was surprised how windy it was this morning when got to work in Palmdale.
The wind has been out of control the last few days :yuk:

[a catered life]

30 mph winds = a lower electric bill :p