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Recent Evaporator questions

Mr.Brain, like you told me to check the setting of the

Mr.Brain , like you told me to check the setting of the control which i did , and made sure compressor less for less time , but what more i did is i closed the liquid receiver line valve atleast by 90 % now liquid is coming back much less , there is much less ice on the compressor and temperature in all the boxes is also good -20 C , but i know this is not a solution so what should i do

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Brian HVAC Guy

HVAC/R Consultant

High School

1,466 satisfied customers
I have a R22 rack system with 5 compressors, the problem i

i have a R22 rack system with 5 compressors , the problem i am facing is there is a lot of liquid coming back in the compressor and there is a huge ball of ice getting on the compressor winding and in the front , we have almost around 50 evaporators with TXV and i checked the superheat of the evaporators and it is between 11 to 16F , no ice on evaporator , and they are open freezers ISLAND TYPE FREEZERS with no box covers over them , but around a year back we did not had this problem of liquid coming back to the compressors, but started since 4 or 5 month , the freezers are of minus temperature and in every freezer the temperature is -18 to -25 , and i want to ask do you check subcooling on such a big system with so many expansions valves ?

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Brian HVAC Guy

HVAC/R Consultant

High School

1,466 satisfied customers
I just moved into a house that is 10 years old. The AC unit

I just moved into a house that is 10 years old. The AC unit came up as an item to watch but not defective on the home inspection because it was "beyond it's normal useful life". The unit was unable to keep up with the summer heat in August and would be, for example, set to 73 but could go no lower then 77. Then I got my energy bill which was through the roof, almost $400 for 1,800 square feet. I had a company come out to do a maintenance on the unit and came back with feedback that there were a lot of red flags and it should be replaced. For example, when pulling off the panels the insulation was falling off, touched the inside of the unit and sparks flied. He taped that back on. Then he pointed out there was "biogrowth" on the air handler (top part of the unit), said it wasn't draining properly and R22 refrigerant could be leaking into the house. He also said the engine was running at 29 out of 30 so it was running at capacity.He looked at the compressor outside and pointed something out about the capacitor saying those things don't get put in unless someone knows their unit is on the way out. (It may not have been the capacitor but was right next to it?) I mentioned it was a good thing I have a home warranty, and the guy immediately discouraged me from using them because he said the work they do is bare minimum to make code and wouldn't really do enough because they don't want to pay for the replacement of a unit. (Which I could see as a possibility) Here was his suggestion:NEED REPAIRSBlower Motor (cost $698)UV System ($380)POTENTIAL PROBLEMSEvaporator coil $2,246Compressor $2,137RECOMMENDED:- Duct cleaning- Upgrading system ($4,800 for seer 13 / basic unit for upgraded York multispeed humidity control, seer 16.75 (4 ton), 10 year labor warranty ($600 value), UV light ($200 "at cost") with instant rebate is $8,000.I went to my home warranty company, (paid $65 total as part of deductible) didn't tell them about this and had them examine to get second opinion. They felt the capacitor on the compressor outside needed to be replaced and did so, were not going to open the panels because they said there's rarely anything going on in there, however I insisted and they decided to change out the capacitor for the motor, saying it wasn't at maximum but was elevated and that the rust was normal it deals with water all day. The unit is 10 years old and should last another 5 to 10 years.So as you see... two very different opinions! The first guy seemed to paint a grim picture but did a more thorough check (including going in the attic to check the ducts) but was pushing an upgrade. The guy from home warranty wasn't too concerned and almost didn't even open the unit until I insisted..... Do I need a THIRD opinion?? I guess that's why I am here. Who is right?

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Gaztech

Owner

Vocational, Technical or Trade School

472 satisfied customers
I have a split type air conditioner made by Mitsubishi. I

I have a split type air conditioner made by Mitsubishi. I was just wondering whether after connecting the copper tubing if there is a valve to open for the refrigerant or does it open automatically? It seems the air should be a little cooler and I was afraid I missed possibly turning a valve.JA: Did you double-check the thermostat's settings? And what about the filters?Customer: It is controlled by a remote and I do have the remote on 18 degrees C (I think 60 degrees F) The unit is new so the filters are okayJA: Do you plan on doing the work yourself?Customer: Yes...I installed the unit and everythings seems to be working correctly, but feels it should be a little cooler.JA: Anything else we should know to help you best?Customer: The outside unit does go off with the inside unit running....probably to save electricity. But, shouldn't the condenser be operating most of the time to generate the cool air...or is it primarily the inside evaporating unit?

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Daniel Plourde

plumbing, hvac technichian

Vocational, Technical or Trade School

510 satisfied customers
Trane xl 1200 model number wcx060g100ab do I need to go oem

trane xl 1200model number wcx060g100abdo I need to go oem or can I get an after market motor?do I need to be worried about the amps in the new motor?ThanksTodd

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Brian HVAC Guy

HVAC/R Consultant

High School

1,466 satisfied customers
My a/c in the house is not cooling past 73 degrees during a

My a/c in the house is not cooling past 73 degrees during a hot day and it takes a few hours for it to even get there. I have twice called for repair and they only looked at the outside unit. Once i was told it is just too hot and the other he put a pound of refigerant in the system and said it was good. My unit is about 10 yrs old i live out in a desert community it is a 3 ton unit

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,956 satisfied customers
I see that my floor or bowing, and my ceiling appears to be

Good evening. I see that my floor or bowing, and my ceiling appears to be leaking. My wife believes it to be the air conditioning. I took a few pictures. Any assistance would be appreciated.Stu

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,956 satisfied customers
When a system is overcharged, does the subcooling increase

When a system is overcharged, does the subcooling increase or decrease? On txv system the head pressure should go up right? How about in an orifice system? Is it gonna go up or it will compact?

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Brian HVAC Guy

HVAC/R Consultant

High School

1,466 satisfied customers
I have a brand new trane heat pump that was just installed

I have a brand new trane heat pump that was just installed yesterday. This is a regular heat pump with electric emergency heat backup. The unit powers up fine, thermostat calls for cooling, the unit kicks on and starts cooling. Approx 10 min later, the outside unit shuts off, and the inside unit continues to run - eventually just blowing hot air around...thermostats still calling for cool air, unit still sees the call for cool air (green LED blinks 3 times).If im reading the cheat sheet correctly, the red error LED is flashing 6 times indicating a "Gas Temperature Sensor Out of Range". Would this sensor cause this issue?

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,956 satisfied customers
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