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How to detect a leak in A/C coolant. the superheat is at 48F instaed of 20. Please advise me, I can not afford paying 400 dollars for the search

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  • 236 Answers

Check if oil is present in the system piping.Or use soap.

Posted on Aug 04, 2008

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What range should your super heat be on txv ?


I normally don't take a superheat reading when I have a txv. That can fool you. A sub cooling reading is the best when a txv has been installed. I've seen normal temp readings of 0° superheat and 16-20° sub cooling with "factory specs". And that was normal! That valve will open and close changing superheat values. Sub cooling is the way to go! Find some manufacturer specs if possible.

May 27, 2015 | Air Conditioners

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What range should your super heat be on the txv ?


I normally don't take a superheat reading when I have a txv. That can fool you. A sub cooling reading is the best when a txv has been installed. I've seen normal temp readings of 0° superheat and 16-20° sub cooling with "factory specs". And that was normal! That valve will open and close changing superheat values. Sub cooling is the way to go! Find some manufacturer specs if possible.

May 27, 2015 | Air Conditioners

1 Answer

Looking for user manual for Insta-Flame H20 fireplace


The Insta-Flame burner was a product of Majestic Fireplace/Vermont Castings, which went bankrupt and is no longer in business. However, Monessen Hearth, bought the gas fireplace and gas log part of the business. But, their new model numbers don't match up yours. If you could provide me with how old your fireplace is , the full Model Number and Serial Number. I may can help you.

Please advise.

Mar 23, 2011 | Air Conditioners

1 Answer

The fridge isn't cooling though the freezer half is working fine. It was recently transported quite a distance in its side (well braced and padded), and left to stand 20 hours before being plugged in. We...


There are 2 reasons. While transporting if they lifted with won wards to discharge side, chances are there to oil entering. And while switch on it starts pumping the oil.Secondly, chance for gas leak.
It's advisable to remove gas and check for leak. If no leak, flush out the system and replace drier.
Vacuum and do gas charging. Please write if it's helpful.

Dec 31, 2010 | Air Conditioners

2 Answers

UNIT IS ONLY 4 YEARS OLD AND IS ON ITS SECOND COMPRESSOR SUCTION PRESSURE SLOW ABOUT GOING DOWN AND DISCHARGE PRESSURE GOES TO 210 THEN WILL DROP TO 200 .UNIT HAS 10 DEGREES SUBCOOLING BUT SUPERHEAT IS...


Hi, sounds as though for this to be its 2nd compressor for such a newer unit, the superheat was not right when the compressor was installed. I don't know what freon you are using the new R-410A or the regular R-22. There's a big difference in pressure, but now I see your pressure reading and its R-22 for these readings.For a 2 ton unit, you would use the superheat charging method for a unit that doesn't use a thermostatic expansion valve ( T X V ) and not the sub-cooling. A 23 degree super heat at that outdoor ambient temperature is way to high for that unit, you will loose the compressor again!!. Super heat killed the compressor is the saying and that's a fact. Suction pressure should pull down just as quick as the head pressure unless the valves are going and weak, or you have a scroll compressor that has a valve plate that is going, or you are low on charge. With a ambient of 95*, you should be at around 270p.s.i. on your head pressure as 210 to 200 is way low. Suction line temp should be around 68 to 70, with a suction line temperature of 50 to 51 degrees, which would give you a 10 to 12 degree F super heat. I don't know when the second compressor was installed, but it has to be low on charge to be such a low head, and high super heat and you will loose this compressor again, its only a matter of time before you have a burnout. It was either under charged when installed, or has a very small leak at one of the joints. I hope the liquid line drier was replaced also. It shows me you have some knowledge on a/c operation, so you need to get that superheat down to between 8 and 10 degrees for this unit to cool properly, and leak check it also. Did you buy a extended compressor warranty? Lets get the head pressure up and superheat down and you should be OK unless the valves or valve plate is weak. Once you loose the valves, you will have a lower than normal head pressure and a high suction pressure. Compressor just won't pull down anymore. I hope I have been of help to you and ask of you to be kind when rating me. I will be here for you if and when you need me for anything.
Sincerely,
Shastalaker7
A/C & Heating Contractor

Jul 02, 2010 | Weather King 10AJA6001AH Air Conditioner

2 Answers

How panasonic charging by superheat


Not exactly sure of the question. You can charge any aircon by touch alone, just by feeling the return or suction side tube temperature. But generally you could also work on a 60psi backpressure.

Mar 19, 2009 | GE Quiet-Aire Ductless Split System Air...

1 Answer

Amana Air Command 80, 20 years old. Electronic ignition. Furnace does not start. Good power to furnace. Themostat properly set. Where do I start looking? Bob


Hello Bob,
Welcome to fixya,

You said, Amana Air Command 80, 20 years old.
Electronic ignition.
Furnace does not start.
Good power to furnace.
Thermostat properly set.
Where do I start looking?

Sounds like you possibly have one or more bad jets if the unit is a gas furnace!
Let me know how it goes.
Huuum

WOW, listen to this story!
I understand you are looking for the solution to fix your furnace your self.
But I want to tell you my story about my smart wife and our furnace.
When we moved into this house the furnace was 20 years old and she suggested that we put a new one that it will save us money.
I laughed at her and replied if it's not broken why fix it!
Six years later it finally broke down and I replaced the whole furnace and central air unit with a new one.
Our utility bill went down $100 dollars a month!
That's $7200. that I lost over 6 years due to not respecting my wife's power of reasoning!
If you can afford it or can get financing replace any unit 20 years old and it will pay for it self.
Can you imaging $1200. a year for 20 years is $24,000 dollars I'm saving with a new and efficient unit.
Do the math!!!!!!!!!

Thank You,
Huuum, Hope I gave you some good fatherly advice.
Please remember to leave a rating


Oct 12, 2008 | Amana Air Conditioners

1 Answer

How to charge coleman mach-3 a/c roof unit 134 or 22


If it needs a charge the leak has to be found and fixed. If the leak has been fixed and you have a service valve on the low side. It should have a vacuum pulled on the system to remove all air and non-condensable gases from the system. Then you can charge the system : 1. by weight according to the name plate. 2. charge by superheat (temperature leaving the evaporator + 16°F) When using the superheat method to charge the higher the Ambient temperature the lower the superheat difference will be.

May 01, 2008 | Air Conditioners

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