"Need help wiring new Honeywell RTH7400 " , posted Mon 4 Aug 23:10

I am replacing my old Honeywell (T8611G2002-9840)with a new Honeywell RTH7400. I thought it would be an easy task, but after wiring it seems the heat comes on in the cool mode (fan works well). The ... read more

Ehaddadpa

"Venting Question " , posted Mon 4 Aug 22:29

I have Duomatic Olsen 2210780A Furnace in a home that is not vented. Since I don't want to die of carbon monoxide poisoning, I'd like to know if I can vent this furnace with PVC pipe out a wall, or no ... read more

Klint

"installed blower. ac dont work " , posted Mon 4 Aug 21:59

i installed a blower motor on a carrier system (res) it works but the ac does not turn on the old motor had 5 wires and the new has only 4. but the schematic says not all motors use the yellow wir ... read more

talan13

"Wiring ?: Robertshaw 9520 to 7400 Honeywell: " , posted Mon 4 Aug 21:36

Hello.Our 9520 died today and my husband took down the thermostat w/o looking at the wiring placement. We are trying to install our new thermostat, which is a Honeywell 7400. We have six wires. An ... read more

cerezab

"goodman heat pump not cooling " , posted Mon 4 Aug 17:16

Everything seems to be running except no cooling. Refrigerant lines not warm, and can't hear the liquid moving in the pipes as usual. Lights dim in house about every 30 seconds like something is try ... read more

StevoRama

"Heat pump is dripping a large amount of water " , posted Mon 4 Aug 12:01

I have a 3 year old Rheem Heat Pump. It is dripping water on the bottom, near the filter. I regularly clean the filter and it's never been too dirty for icing and is not frozen. The unit cools just fi ... read more

pkgbear

"TRANE BUILDERS GRADE XB-13 VERSUS XR-13 /14 " , posted Mon 4 Aug 07:56

Going from a standard eff XB-13 to a high eff XR-13 or XR-14 Trane adds about $1000 to price... Someone told me just get the the cheaper XB unit cause its the same thing...just w/o compressor noise i ... read more

Fred97

"Goodman Outdoor unit " , posted Mon 4 Aug 06:26

I have a condensor fan that will not kick on. I have attributed it to a bad motor. The unit is a Goodman Model:CPLE48-1C, is this a 4Ton Unit? Bought this house less than 2 years ago and have no ide ... read more

knoxvilletn2005

"Time to reach 500 microns " , posted Sun 3 Aug 19:07

Hello all,I just purchased a Robinair 4cfm vacuum pump and running it through some tests. Could anyone give me an idea about how long it should take the pump to reach 500 microns when evacuat ... read more

Dale C Houser

"condenser " , posted Sun 3 Aug 14:30

can you show location of the capacitor, for the fan and compressor on a goodman unit.. ... read more

gnzls21

"Payne Unit - Whines/ Hums " , posted Sat 2 Aug 14:19

My Payne units are about 12 years old and one of them whines or hums inside when running. It's most audible at the intake. Filters are fine. Any ideas? ... read more

DanDavis

"10 YEAR PARTS AND LABOR WARRANTY " , posted Sat 2 Aug 08:23

Is the optional 10 year /parts and labor warranty on a new American Standard 410a heat pump worth $300?Thanks..Fred ... read more

Fred97

"CONDENSATE LINESET FOR 410A " , posted Sat 2 Aug 08:18

Im replacing my old heat pump and they came to measure and said my 1" inch condensate lineset on my R-22 system was overkill, and that a 1/2" copper line is all I need especially for R410A.Is ... read more

Fred97

"condensate lineset for 410A " , posted Sat 2 Aug 08:03

... read more

Fred97

"question " , posted Fri 1 Aug 22:30

how do you keep the high eff. furnace drains installed in an attic from freezing ... read more

just asking

"How much is too much? $$$$ " , posted Fri 1 Aug 19:19

How much should I pay for a 40-5-440 Trane capacitor installed by a service tech. during normal business hours? I realize there is a service/dia charge. I'm interested in the RETAIL part cost. If p ... read more

Charlielt4

"Set furnace continuous blower to low speed " , posted Fri 1 Aug 16:36:

I have a Lennox G20Q3/4E-125-C3 furnace and a Lux TX9000LC programmable thermostat. To help keep the house cool before the AC was installed, the AC blower (black) wire was connected to the blower low ... read more

Neil needs help

"Bryant control board replacement " , posted Fri 1 Aug 13:55

I have a Bryant HVAC unit in my rental unit. It is model number #394GAN02A050 Serial #4086403536. The guy doing the weedeating severed the thermostadt wire and this shorted out the control board. I wi ... read more

dpmooretn

"heat but no a/c " , posted Fri 1 Aug 01:11

furnace won't turn for a/c only when I turn on the heat. I don't really know anything about HVAC. But I want to have an idea of whats going on when the repair man gets here. This happened earlier toda ... read more

jmizz

"AC/Heating problems " , posted Thu 31 Jul 20:35

We recently replaced our thermistat out for a digital one, and are having problems getting things to work. Following the instructions, we have:W-WhiteRH-jumper to RCG-greenY/Y1-yellow< ... read more

djsmitty

"thermostat " , posted Thu 31 Jul 15:28:

I have a trane BAY28X139 and I'm replacing for a robertshaw 9620 is for heat pump with 2 stage heat 1 stage cool on the old one have a conection with letter T I don't have that one on the new the old ... read more

gabrielnorbac

"Trane heat pumps XR-13, XR-14 " , posted Thu 31 Jul 12:04

I am looking at bids for these 2 heatpumps with identical coil= 4TXCC049BC3HCA to go with my exsisting 13 year old single stage Trane furance XE-90 hybrid propnae backup system. I have some ... read more

Fred97

"blower " , posted Thu 31 Jul 11:53

on a gas heater/ a/c unite, in the cool mode the blower run very slow,,, no air out of the vents ... read more

gnzls21

"inside blower " , posted Thu 31 Jul 09:32:

I repalced blower motor but not the capacitor the motor does 3 cicles working good and the blower don't come on just the compresor ... read more

gabrielnorbac

"HEAT PUMP CONFUSION " , posted Thu 31 Jul 09:30

I am confused regarding a replacement heat pump. I need to replace a Trane (circa 1995) Weathertron heat pump model XE1000 and evaporator coil....this is a 4 ton unit with matching coil that sits ato ... read more

Fred97

"blower motor " , posted Wed 30 Jul 21:40

blower motor runs slow,,,no air out of vents ... read more

gnzls21

"When to replace a heating /cooling system? " , posted Wed 30 Jul 19:37

First of all, my apologies if posting on two different forums is considered bad taste here. I am not sure who reads and answers what on this forum.We have a natural gas Armstrong furnace with ... read more

Joe Pack

"Thermostat Problem? " , posted Wed 30 Jul 19:08

I have a RTH7400 with no display at all- just the green backlight. I took it off the wall and tried to check voltages at different points, but I'm not getting anything(I hope I'm doing this correctly) ... read more

dragonfly1234

"Proper testing of Home AC Refrigerant " , posted Wed 30 Jul 18:55

I recently had my 2 AC condensers checked. The tech connected the gauge and determined a high psi of 240 and 245 in each unit and a low psi of 70 an 65. He said the charge was ok. When he disconnec ... read more

mikeinaz

"Not cooling the house down " , posted Wed 30 Jul 16:30

I had a new whole HVAC installed over this past winter 2007 (new Furnace, A/C unit, and coil). The house stays cool, but the new A/C (outside unit) runs continously from about 12:30pm to 8pm. It canno ... read more

kit4u

"no heat " , posted Wed 30 Jul 13:20

I recently replaced the ignitor lockout control. Ingnitor works great and I have a pilot light but burners won't igite. Any suggestions??? ... read more

Jan

"E1eh-015ha Intertherm " , posted Tue 29 Jul 20:23

The unit just quit Chnaged t-sat but still does not work. i took the front pannel off and switched the auto fan on switch on but nothing still. The only thing i can think it would be is the transfor ... read more

Dewey712

"t-stat replacement " , posted Tue 29 Jul 15:00:

i am trying to replace my old mercury thermostat with a honeywell focus pro 6320 and i am a little confused. here is what i currently have W1 - white with brown stripeW2 - brown with whi ... read more

rogersandre

"a/c coil mismatch " , posted Tue 29 Jul 14:51

Does anyone know why sometimes a contractor will install 1/2 ton larger coil on an a/c system? such as a 2 ton condenser with a 2.5 ton coil. And what are the advantages, disadvantages if any? ... read more

rlb444

"Heil heat pump infomation " , posted Tue 29 Jul 10:37

I have a heil heat pump model HHP242AKA1. I need to find out information on it as well as wiring diagrams. Where do I find these and infromation on older models of heil? ... read more

arkim

"HONEYWELL RTH7400 " , posted Tue 29 Jul 10:09:

OLD WIRES ARE AS FOLLOWS Y-YELLOW G-GREEN R-RED O-OR ... read more

rober16s

"Trane Condenser Replacement " , posted Tue 29 Jul 08:20

I have a Trane XE1000 Model TTR025C100A2 Condenser with locked compressor. Any ideas on replacement unit or compressor. Where can I purchase at good price? ... read more

DR46

"thermostat " , posted Tue 29 Jul 00:29

i just recently added a a/c to my oil burning unit , i installed a thermostat to replace the heat only one. well everything works fine, except the thermostat it reads the temperature wrong. it says it ... read more

tmoney512

"Honeywell CT8775C Therm. Not Reading Correct " , posted Mon 28 Jul 17:39

Thermostat temperature reads correctly in heat position but incorrectly in the cool position. Have a digital thermometer next to the thermostat and when the compressor is not working they are within ± ... read more

arthurh

"Keeps running long " , posted Mon 28 Jul 13:10

Lately I have noticed that my ac unit keeps running longer than it use to when temp is met. The thermostate is set at 71' once temp is met shouldn't it shut off in ???? min after temp is met My unit i ... read more

CoolEd