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There are 29037 articles in 2914 discussions. See the most recent and the best rated articles in HVAC Discussions

The most recent discussions

6AWG connecting to a 30 Amp breaker

August 16, 2017, 1:52 am

I am replacing my air handler in the attic with a newer and more efficient model located in a closet on the ground level. I will start at the main panel for (hopefully) some clarity. 60 Amp breaker... Read more »


August 15, 2017, 7:42 am

According to the latest AC newsletter...R22 has some new regulations coming up. I personally thought R22 was a dead issue to be replaced with substitutes or newer equipment. -- It is hardly to... Read more »

AC Condenser Unit Relocation

July 5, 2017, 4:23 am

One of my neighbors, as part of a backyard renovation/landscaping project, will be moving their condenser unit from a northern exposure, to eastern exposure. It is a 5 ton unit, and probably 2-3 ye... Read more »

dielectric cooling of computer clusters

June 28, 2017, 9:58 am

One company that I worked for has converted their computer clusters to dielectric fluid cooling. Not sure who kitted them out, but one such vendor is: http://www.grcooling.com/energy-2/ Now what... Read more »

TXV valve replaced, reversing valve replaced, lines flushed and a/c still i...

June 27, 2017, 11:43 pm

Our central air stopped working about 6 weeks ago. We have 6-7 year old Tappan unit. We were getting air through the vents inside but the air was not cool and the compressor outside wasn't running. W... Read more »

Ac issue

June 19, 2017, 4:51 pm

I have an air exchanger in a walkin crawl space. One of the ac vent feeds about 6 ft. from the exchange has mildew around the outside foil ventilation pipe insulation. What is causing this? How can... Read more »

Looking for A/C info - Tonnage and SEER rating

June 12, 2017, 1:08 am

I am under contract to buy a home that has an older RUUD unit. The model number is Uead-1415j. I have tried finding info online on this unit and have been unsuccessful. Does anyone have specs on t... Read more »

Installed cost of a 24000 BTU 4-unit mini-split systm

June 8, 2017, 8:49 pm

Greetings! I just had an estimate for a 24000 BTU 4-unit mini-split Carrier system. I have a 900 Sq ft ranch--with a complete 900 sq ft semi-finsished basement. 3 units would go on the main floor ... Read more »

air conditioner not working properly

June 5, 2017, 1:18 am

The temperature never recovered after it automatically adjusted for power savings on Friday afternoon. Temp set at 77, thermostat temp says 90 degrees. Honeywell Utility Pro smart thermostat. Read more »

Is having no cold air return harmful

May 24, 2017, 9:44 am

And how is it harmful? -- for full context, visit https://www.homeownershub.com/hvac/is-having-no-cold-air-return-harmful-48546-.htm Read more »

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The best rated discussions

Honeywell thermostat issue

rating: 5

I have a gas fired forced hot air heating system and I replaced the old Honeywell Thermostat with a Heat Only Honeywell Thermostat from Home Depot because the Heating System didn't kick on when the ... Read more »

Simple thermostat wiring for on/off

rating: 5

Hello all, I want to connect a wood furnace to a thermostat, but I don't know the coloring conventions here. The thermostat is a Honeywell RTH8500. For conventional heat, the left hand side is: Y2 W... Read more »

Cannot find Refco vacuum pump oil.

rating: 5
  [ 2 ]

Hi All, I have Refco Eco-5 vacuum pump and looking for vacuum pump for it. Refco recommended original Refco DV-44, DV-45 and DV-46 oils, but I believe that any substitute from Castrol/Pennzoil, etc. ... Read more »

I smell gas ???

rating: 5

My house sometimes smells like gas. Should I have a pro look at it? (it's a nice looking house) I tested all the pipe joints with a Bic lighter and I cant find any leaks so I dont want to replace m... Read more »

Subbing out rough ins

rating: 5

I tried to reply to this question a while back in one of the threads but my Out...Ex... never sent it. I'm in Myrtle Beach, SC & there are a lot of rough in subs here. For me being a small business ... Read more »

Hunter B01 thermostat (44110)

rating: 5

I have a 4-wire system, but t-stat requires me to guess whether the weather is going to be too hot or too cold because I have to choose heat or cool mode via a switch. It won't do both at once. ... Read more »

Chest Freezer hot two sides only

rating: 5

I have a Frigidaire Chest Freezer that stopped cooling. It was low on Freon and Freon was installed. It now cools and is setting at -2.4* F. However, only the front and left end of the freezer dissip... Read more »

Puron and Freon - Just Scams?

rating: 5

Hello all, I came across this article in the web where it is claimed that puron and freon type of gases are not more destructive to the ozone layer than laundry bleach and pool chlorine. What do you ... Read more »

Odd new record high ambient temp behavior, Trane XR12

rating: 5

I have a 7 year old 3 ton Trane XR12 heat pump unit (2-stage heat, 1 cool) servicing a 1500 sq ft single story house in North Texas. The outside compressor is located in a western alley where it gets... Read more »

air conditioner fire

rating: 5

http://www.youtube.com/watch?v=ku1PO923ShQ About 1:16 into the video, we see the unit under a deck, with gate, and tiny access. Does anyone else but me see why this setup could be a concern? ... Read more »

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