"Drip pan below evaporator coil " , posted Sat 16 Aug 13:42

How far out should the run-off pan (beneath the evaporator coil) extend past the evaporator coil part??I had the service men replace the old coil and drip pan below it, but it looks like they ... read more

runner

"DONATIONS " , posted Sat 16 Aug 11:58

I just made a donation I know that it takes time and money to keep this web site up and running It wasn't much at all but every little bit helps. I thank you and everyone for all your hard work for ... read more

ONEMOREBET

"moble home unit " , posted Sat 16 Aug 11:21:

i have a cole electric furn with a pacage a/c with its own transformer also coleman i know you have to wire or isolate the units at the stat i have a 1 heat 1 cool aprilair stat the diagram says to to ... read more

envirosystemtec

"CONDENSER FAN KEEPS SHUTTING OFF " , posted Sat 16 Aug 00:38

ON MY outside condenser for my home A/C the fan on top of the unit keeps shutting off out of nowhere. When I turn it on the fan has a hard time starting I've had to hit the top of the unit a few times ... read more

ONEMOREBET

"new Thermostat trane xr402 to vision pro " , posted Fri 15 Aug 19:54

I am a little confued on the wiring. I havea Trane XL15i with aux heat. I cannot seem to find out what the black and brown wires are for. The thermostat I am trying to connect is Honeywell thermos ... read more

rhino73

"dc90 smells from outside exhaust vent " , posted Fri 15 Aug 19:51

I have a heil dc90 furnace that was put in in 1997, what I have found is when the furnace is running there is a gas type smell that comes out of the exhaust vent. carbon monoxide detectors do not pick ... read more

knucklebuster

"Furnace running during hot weather " , posted Fri 15 Aug 19:17

My furnace has started to run, even though I have it off at the thermostat. If I power off everything for a few hours and the temperature outside/inside cools down the heater remains off, But when it ... read more

Cheitz$

"Noisy duct " , posted Fri 15 Aug 17:35

I have a Trane Gs furnace Model TUD100R9V5K4 with variable speed blower. The outdoor unit 's Carrier Strait A/C Model 38TKB048350 R-22. Homeowner says the unit ( this one ) is noiser thant the pre ... read more

Rooky

"This is an odd one... Trane system. " , posted Fri 15 Aug 01:37

I have a Trane XR90 gas heating and air conditioning system for my first floor. The programmable T-Stat is set to go from 79 to 86 at 10pm. When it was 10pm the T-Stat did its thing and switched to ... read more

csmpez

"condensor question " , posted Thu 14 Aug 22:25

I have two side by side condensers, one blows hot air (normal) and the other blows cold air. Is this a problem waiting to happen? I've read that dirty condenser coils impact the efficiency... any re ... read more

1puttpro

"Freeze up solution anyone? " , posted Thu 14 Aug 15:16:

I have recently charged a unit that was freezing up. The unit operates at about 43*F at the evaporator coil and it is 90*F outside air temp. The house sits vacant on Lake Conroe during the week and ... read more

timdecker

"AC ISSUE " , posted Thu 14 Aug 13:30

Had new Carrier Comfort 3.5 ton, seer 13(inside & outside units) installed for about 1550 sq ft home late April 2008, Houston Tx area. Didn't seem to cool as well as old unit & late May when it start ... read more

bjw

"kelvinator furnace " , posted Wed 13 Aug 22:30

Furnace works good on heat side. pushes very little air on cooling side. Checked concdensing unit.ok checked filter ok barely feel air trickling out of registers. unit is 2 years old. 90 plus with 2 t ... read more

mikeshemi

"Why won't anyone help me? " , posted Wed 13 Aug 21:30

I'm looking to replace my 15 yr old cast iron, baseboard hot water oil furnace with a duel fuel wood gassification boiler. I've found a unit I like and have worked out prices with the importer. The pr ... read more

bmike

"New Heat pump Low freon? " , posted Wed 13 Aug 08:43:

I had a new heat pump installed yesterday. It comes precharged for a 15 foot run. I have a run of 30". It looks like a little escaped during the hookup and they did not add any to the system. It r ... read more

accce

"wiring " , posted Tue 12 Aug 21:40

i am replacing an old t-stat with a new T7350D1008.old t-stat wiring designation are as follows:Blk- X2, Blu- B, Wht- W, Orn- O, Red- R, Grn- G, Yel- Y,how do i wire into new t-sta ... read more

jorden90

"Heating/AC PTAC unit question " , posted Tue 12 Aug 11:22

Hi,I currently have a PTAC unit (model Suburban Manufacturing DL3-1220) installed, a direct natural gas vent heater and an A/C, but I do not know how to operate the build in thermostat in the ... read more

ayumi_arisas

"cold liquid/high side warm vapor/low side " , posted Tue 12 Aug 11:21:

I'm having trouble with a unit where i'm getting readings of enough refrigerant in the system but the compressor is going into overload because of slugging. I thought it might be a clogged filter drye ... read more

Loaf

"Excess Relative Humidity-New Rheem Prestige " , posted Tue 12 Aug 02:13

We recently had a new 16 SEER / 2-Stage Variable Speed Rheem Prestige System installed in our home. We live in New Mexico with relative humidity hovering around 20% outside. Our inside RH wit ... read more

Steve S

"coleman evcon intermitent problem " , posted Tue 12 Aug 00:39

The problem is in a manufactured home. I have a problem when in the cool mode somtimes when the thermostat is satisfied the compressor will go off, but the fan still running. I have to go over to the ... read more

surferjogomango

"3 or 5 ton? " , posted Mon 11 Aug 22:15

I have an approx. 20 yr old Lennox HS18-651-2Pcompressor- tag on the unit does not say how large it is- does anyone know- 3 or 5 ton unit?Thanks ... read more

friedo

"Eliminate two stages " , posted Mon 11 Aug 22:05

I want my two stage cooling to always operate like a one stage-both stages either on or off together. Can I do this by crossing the Y2 wire to the Y1 terminal with the Y1 wire in Y1 as well?Th ... read more

jgmatera

"Goodman 2.5 ton 10 seer parts " , posted Mon 11 Aug 11:40

I have a goodman 10 seer 2.5 ton central a/c unit with a problem. I have been told that the black cuclindrical part (condensor / compressor) is bad after a lightning strike. I have been told that ther ... read more

piclpus

"TRANE CHILLER WIRING DIAGRAM " , posted Mon 11 Aug 08:15

Dear:we have this trane compressormodel :*2e5g51nserial no :g3ho5m5603we need documents about chiller and electrical wiring diagram and logic for how to step work startup or shutdo ... read more

M_SATVAT

"Actual performance - Goodman GSH14 " , posted Mon 11 Aug 07:55

Just installed a Goodman GSH14 2 ton heat pump.Cooling seems low - from wet bulb temps we calculate about 18,000 BTUH total. Delta T across coil is 13F instead of spec sheet 16F.And cu ... read more

dirtyoldm

"new thermostat wiring " , posted Sun 10 Aug 23:53

I am replacing my older programable Honeywell tstat for my heat pump with a newer Honeywell RTH 7000 series tstat. The old one failed. All was going great, marked all of the wires correctly from the o ... read more

pickview

"hvac simulator " , posted Sun 10 Aug 23:17

i asked a while back if there was one out there someone gave me one that was in dos format anybody got anything newer great learning tool thanks in andvance ... read more

tnhvactech

"houston204 " , posted Sun 10 Aug 22:58

i always look when you answer a post on here you always have great drawings where do you get that stuff its really useful is there a place i could get this stuff?ya never know enough thanks in advance ... read more

tnhvactech

"New heat pump " , posted Sun 10 Aug 22:55

I have a 3 ton unit inside (coils) bryant. I was told to put a 2.5 ton heat pump out side for best performance. Why should they not both be 3 ton's2 year old bryant 3 ton inside and a new br ... read more

accce

"Catch-All Refrigeration Dryer " , posted Sun 10 Aug 22:14

I am having a new compresor installed for my heat pump. Should I replace the Catch-All Refrigeration Dryer at the same time? ... read more

accce

"Help! Just changed my Fan Controler (ICM 275) " , posted Sun 10 Aug 12:02:

A/C Question: Just replaced Fan Control Unit and now the Blower false starts every time the Cooling goes onI had an HH84AA009 in my carrier air handler. This air handler does both cooling and heat ... read more

redmachodevil

"Fan " , posted Sun 10 Aug 09:04

Even with the furnace OFF at the thermostat the fan sometimes comes on even though the thermostat fan setting is on AUTO. Can someone tell me what may be causing this?FURNACE INFO:Brand: A ... read more

inspectdan

"Installed new T-stat & AC won't come on " , posted Sun 10 Aug 08:39

I had an old carrier heat pump t-stat and tried to change it out to a aprilaire 8346 digital. I did this on my downstairs unit and everything is fine. Upstairs, I changed them and now the system wil ... read more

crystal

"Rectorseal pipe dope...not trying to be funny " , posted Sat 9 Aug 19:50

Has anybody used this for natural gas? If so how has your results been. Guy wants to sell me a case, says he used it for years and is getting out of hvac. Thanks ... read more

fluepipe3

"No air coming from vents... " , posted Sat 9 Aug 17:49

Ok the vents inside my house are cold but there is no air coming from them. The thermostat is set to 72 but it is about 85 degrees inside.The air return filter was horrible, it has been replac ... read more

Drafin

"3 wire to 4 wire fan motor " , posted Sat 9 Aug 15:21

old fan motor seized up on condenser. old wiring was br-outer post of capacitor. rd - center term of cap. bk-L1. new motor has br- cap. br /wht-cap. pur-L1. blk- L2. where do they go. help! ... read more

pdidy

"Carrier 8000 Fan not running " , posted Sat 9 Aug 12:04

We have a Carrier 8000 [Model 58TUA12016 series 100] furnace and just added an AC unit. We used to be able to run the fan constantly to keep air moving and filtered (set FAN switch to ON) but now the ... read more

MPG

"GEOTHERMAL HEAT " , posted Sat 9 Aug 06:41

We have a new tempstar furnace. We also have a heated water line from the lake. Is it possible to retrofit 'things' to get geothermal heat? For example, could we get a bigger heated water line and ... read more

lorna

"Split system is not cooling " , posted Sat 9 Aug 00:45

My air handler is running and pushing air. when I checked mycondensing unit the fan motor was not working. I did get it running again but still no cold air. It seems that nothing is running throug ... read more

THEDYM