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I had my Lennox A/C charged on 6/24. It needed 3+ pounds of

I had my Lennox A/C charged on 6/24. It needed 3+ pounds of the older refrigerant since it is about 16 years old. The A/C lines run from the evaporator coil which is above Lennox furnace through the attic above ceiling and out to condenser. About 3 days later, I noticed two areas in the ceiling forming water stains. A/C person said "water line" to A/C froze (this is June and I've had this A/C for 16 years. This has never happened and I live in Denver). A/C person said "they" should never have used copper line and said he would replace it with plastic line. This doesn't make any sense to me at all. He said he "braised" three area where there were leaks. Could overcharging the unit have caused this? Why would this happen after 16 years of surviving winters? Am I missing something?

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,806 satisfied customers
I have a central AC unit that is based outside my home.

I have a central AC unit that is based outside my home. There is a pipe with insulation around it going into my house. Recently the walls where the unit is have begun to vibrate and there is a loud noise coming from the bottom of the A C unit. The fan works and the unit is producing cold air, but these noises and vibrations are problemmatic.

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,806 satisfied customers
I have been using my nest thermostat for a couple of years,

I have been using my nest thermostat for a couple of years, no problems. The contactor in my AC unit failed and I replaced it. The thermostat is delivering 24 volts to it and the contactor is working just fine, but the thermostat is now reporting an E30 error, eg no connectivity to Y1. Any thoughts on what can cause this? Might I need a larger transformer ?JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?Customer: Well the Contactor failed first, but hard to tell if we have a chicken or egg problem :- )JA: What are all the symptoms of the problem (error codes, flashing lights, etc.)?Customer: When I first installed the new contactor everything worked fine for about half an hour, then after about half an hour the thermostat reported that the wiring had changed, when I clicked in, I got the E30 errorJA: What happened just before this problem started? What troubleshooting have you tried?Customer: My old relay was clicking on and off, and the contactor contacts had welded themselves shutJA: Anything else you want the HVAC tech to know before I connect you?Customer: No

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,806 satisfied customers
Humidity level of 81% inside my home (downstairs in a two

Humidity level of 81% inside my home (downstairs in a two story home). I have two heat pumps and the downstairs feels humid. Almost like living in Houston. I'm here in N.C. and the humidify setting on the control is 42% and the dehumidify is 45%. My crawlspace has 6 mil plastic and automatic vents. This summer has been hot and more humid than normal. It has rained almost every week. How can I decrease the inside humidity level? What settings should I have until this weather has passed on. I live in the piedmont area of N.C.

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HVAC Guru

Service Technician

Associate Degree

25,572 satisfied customers
I have a 2 ton unit newly installed on my 1189 soft 1973

I have a 2 ton unit newly installed on my 1189 soft 1973 townhouse that runs 15 plus hours a day yesterday the temp ranged from the 80s to the 90s and it ran from 9 am until 1130 at night my HVAC tech is telling me this is normal but I wonder if the AC is undersized for my house even though it gets to the set temp will this eventually cause me problems?

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Daniel Plourde

plumbing, hvac technichian

Vocational, Technical or Trade School

466 satisfied customers
I do not get power to the thermostat and the outside unit. I

I do not get power to the thermostat and the outside unit. I have tested the power source and have power to the unit and to the control board. but the out put side of the control board does not send power to the fuse and on to the thermostat. I have pushed the contact points bypass and the condenser works. Is the board the answer or should I check some more points of the wiring before I order a new board?

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220 satisfied customers
I have a two zone carrier system instaled right around 2000.

I have a two zone carrier system instaled right around 2000. Thermostats are non programmable TSTATCCNAC01-B_Comfort_Series. Problem is that on upstairs zone if I turn the Thermostat to off after having AC run it seems to kick on the heat.JA: Did you double-check the thermostat's settings? And what about the filters?Customer: FIlters are new (swapped 2 weeks back). I checked the setting to make sure THermostat said off and Fan is on Auto (not run).JA: Do you plan on doing the work yourself?Customer: Depends on the work. Seems like it may be a thermostat issue. I don't have a manual so I'm niot sure if it can be reset or possibly needs rplaceJA: Anything else we should know to help you best?Customer: I think that covers it. System was fine until last night. Cooled the bedromms upstairs to 80 before bed. Shut the system off like every night only to find gthe temp sozr to 87 inside a few hours. Woke up, put back to cool and within a few hours back to 80. Set to off and it rocketed back up.

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Gaztech

Owner

Vocational, Technical or Trade School

438 satisfied customers
I don't know where to connect the blue & black wires, 2 hrs,

I don't know where to connect the blue & black wiresJA: I'll do all I can to help. How long have you been dealing with this?Customer: 2 hrsJA: Do you plan on doing the work yourself?Customer: yesJA: Anything else we should know to help you best?Customer: I have all the other wires accounted for

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Brian HVAC Guy

HVAC/R Consultant

High School

1,414 satisfied customers
I have purchased a multi level house on stilts in a rock

I have purchased a multi level house on stilts in a rock quarry, a stream runs under the house. The current HVAC system has the ductwork under the house, exposed ti elements. Its is 10 years old. We live in Western NC. The current system cannot heat or cool the house properly. Should we install mini splits? or a new unit ( gas) that we put IN the house. Currently the HVAC is a heat pump located outside. Help?JA: Did you double-check the thermostat's settings? And what about the filters?Customer: Yes. we used thermoters as well as the thermostat. They had no filters installed.JA: Do you plan on doing the work yourself?Customer: we could probably do the mini splits ourselves but not the HVAC. The great room is large with cathedral ceilings. Techs here said the big minisplit would be noisy. Do you think so?JA: Anything else we should know to help you best?Customer: House is 3000 sq ft. Lots of high ceilings. Next to granite rock, so cold in winter. Lots of humitidy due to water coming down rocks. Sometimes lots, sometimes little

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

9,878 satisfied customers
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