"Need ideas " , posted Wed 26 Oct 08:53

HELP!!,I am working on a tough one, it's a Heil pachage unit installed on a modular home, way oversized.It had a fire in the E-box in Feb. and someone replaced the board and some of the wiring ... read more

bulldogmechsrvc

"Find tonnage " , posted Tue 18 Oct 20:05

I am replacing my AC unit and furnace. I need to find out the current tonnage that my AC unit is. I have a Lennox, model HS184115P. I believe the until 15 years old. Any help would be appreciated. ... read more

pressurekooker

"Trane unit " , posted Tue 18 Oct 12:29

Morning, I need to know what it means when the light in the stats on the wall turn green, yellow, or red when the stat is turned higher or lower? The stats in question are Honeywell T6984D and T79 ... read more

mnpman

"trane " , posted Wed 12 Oct 16:50

Can someone help me with the installer guide for trane model #twe060d150b0.I am trying to wire in my stat for the heater that was just installed.Need to know why wires 11,22,& 33 are tied together. ... read more

whestleme

"wiring of totaline P374-1600 " , posted Mon 10 Oct 22:57:

I just bought the Totaline P374-1600 and I'm not sure how to connect the wires from the old thermostat ( I have a gas heat pump ) the wiring for the totaline is :W1/O/BY1GW3/ECOCK1 ... read more

christx

"Application help " , posted Thu 29 Sep 11:19

I have an Exquisite Heat product and I am looking for advice as to how this may be applied to Air condiditonong. Details are available at my web site. ... read more

Exqheat

"Pilot Operated EPR Valve " , posted Sat 24 Sep 13:15

How do these things work. They use high pressure gas to pilot the normally open valve. ok. There are three pressures.... High side Pressure, Evaporator Inlet Pressure, and Spring Pressure..How ... read more

Rookietech

"low suction " , posted Fri 23 Sep 14:31

I'm only running 30 psi on suction line. Filter and coil look good, and fan is running. Any suggestions? ... read more

logan317

"suction line freezeing at compressor " , posted Sat 17 Sep 03:14:

i have a 10 ton condenser replaced compressors and charged system filter dryer was not changed suction line begins to freeze starting at the compressor what could cause this other than in correct cha ... read more

treeclimber121

"twining " , posted Fri 16 Sep 22:13

what is twining ... read more

dann

"URGENT - looking for a relay " , posted Thu 15 Sep 05:21

Anyone know where I can locate a special relay that operated two pumps on a 1949 Johnson-Prutte air cooling system. The relay was used to turn on two pumps, when one would start to get hot the relay w ... read more

ceragon

"Water Source Heat Pump Waste Heat Recovery " , posted Wed 14 Sep 11:00

I am replacing a 15 ton Recold Evap Tower. I have considered recovering the waste heat to heat the swimming pool. Suggestions on how to do this effectively. Thanks ... read more

searchman

"High Limit Switch " , posted Wed 14 Sep 09:55

I have day and night furnace. Today the heat would not kick on. I have replaced the high limit switch before by a technician. This seems to be acting the same way it did before. Is there a way to ... read more

Kelly Hancock

"Lux psph521 heat pump Hell-p " , posted Sat 10 Sep 00:23

Hello!I just purchased the above T-stat and am having trouble getting it all hooked up. I am coming from a Coleman Evcon T-stat.On the Evcon I had this setup.O = Orange W2 = ... read more

Taylor

"1953 Insulated Ducts " , posted Thu 8 Sep 14:44:

When our church was built in 1953 the duct work was lined with insulation and the same duct work is still used today. What concerns us now is that some of the soot and/or insulation is being expelled ... read more

LYates1

"high discharge pressure " , posted Wed 7 Sep 13:33

hey all i was wondering i have a 3ton trane unit with a hermetic compressor. i start the unit up and the suction pressure is around 70 but my discharge pressure goes from 225 till 375 and cuts out on ... read more

nickaldime

"York Chiller " , posted Sat 3 Sep 22:58

I am having a problem with the 2nd compressor dropping off for high amps. The unit is not loading correctly. The digital readout always shows the slide valve position at 0. The #1 compressor works fin ... read more

ThermalTM

"Surge Problems on 19XRV Carrier " , posted Wed 31 Aug 14:05

We have 2 500 ton evergreen carrier chillers. They both have surge problems. Our #2 chiller is our problem child. It cuts off due to excessive surges. The float valve chamber sweats and the top of th ... read more

exbt2

"Re(1):old sears condenser unit tonnage " , posted Fri 26 Aug 10:24

... read more

RANGER1

"old sears condenser unit tonnage " , posted Thu 25 Aug 09:49

I WOULD LIKE TO KNOW THE TONNAGE OF OLD SEARS CONDENSER OUTSIDE UNIT, MOD # 867.861211/ SER#411932H69 THANKS,RANGER1 ... read more

ranger1

"Window A/C " , posted Wed 24 Aug 17:47

If my window unit starts (Fan and compressor) but then the compressor kicks off, could it be a capacitor problem??? ... read more

joe510

"rheem roof top " , posted Wed 17 Aug 18:41

i have a rheem roof top unit, that just stopped working after i turned the unit off, by way of the thermostat to sevice filters. I cannot get the fans , ac or heat to operate. I have 240 volts goin ... read more

ralphy

"compressor for island " , posted Mon 15 Aug 02:00

Hello rustymikeThe condesening unit is going to be part of the cooler.The indoor temperature is minus 6 CThe ambient conditions are +25 C 60% RH ... read more

d0l0b

"Lennox GCS9-653-153-19 " , posted Wed 10 Aug 06:41

Can anyone tell me the specs. for this RTU?Thanks! ... read more

tkolbe

"Compressor for island " , posted Tue 9 Aug 04:26

Hello experts,I need make island case with built-in condensig unit and capillary tube.The air temperature inside may vary from minus 6 C to plus 6 C.Should I use LBP or MBP Embraco compres ... read more

d0l0b

"Frick 100 Ton Compressor - Cost Question " , posted Sat 6 Aug 20:19

Hey all. I was wondering what a fair price is for a reconditioned Frick 100 HP, 100 ton compressor for an office HVAC system.I really know very little about this, but would appreciate any feed ... read more

IgnoranTofHVAC

"Noisy Compressor, Low Suction " , posted Thu 4 Aug 15:58

I found the Geothermal plastic line to the field was nearly dry so the pump was overheating and not pumping water to the exchanger. This made everything overheat and cause bad pressures and kickouts. ... read more

JLW

"Noisy Compressor and high head pressure " , posted Wed 3 Aug 15:53

Just replaced a compressor on a FHP Geo unit and I purged with Nitrogen three times and charged three times. The pressure climbs out and shuts the unit down. The low side is only 30 PSI and the high ... read more

JLW

"hvac 24v triac signal controller " , posted Tue 2 Aug 22:06

I have a 24v triac signal controller for 3 wire modulating cw valve for a Trane fan coil unit I want to troubleshoot.I have only work with 24 volt no or nc vales before.If I tell the valve to open 100 ... read more

ray3820

"Help w/Honeywell temp sensor " , posted Mon 1 Aug 22:42

Can sombody please explain to me how heat sensors work in place of t-stat. Is their a T-stat that controls it some place or is it a set temp using resistance? ... read more

ottoreload

"Need Help Hooking up Lux TX9000TS " , posted Sat 30 Jul 15:09

My original unit was Baystat239.It had:X2- Black wireG - Green wireY - Yello wireB - Blue wire R - Red wireW - White wire O - Orange wire my new TX9000T ... read more

Bambam

"help on roof top comfort unit " , posted Sat 30 Jul 13:49:

I m having trouble with a rooftop unit .When you turn it on the comp starts and cools for almost 90 seconds and than it stops cooling and you hear a venting sound as pressure is relieving inside.is t ... read more

tg2

"Question from a beginner. R12 in a R22 system " , posted Fri 29 Jul 19:49

I am a building maintenance technician and only know the basics of this field.I am repairing a refrigerator reach-in for a restaurant. This unit has been out of order longer than any of the em ... read more

lomotil

"Finding tonnage " , posted Wed 27 Jul 20:08

Hi, I hope I can recieve some help here. I have a condensing unit that is very old and needs replaced. I Dont know the manufacturer of the unit but have Model # 867819520, manufacturer # s799404a, sty ... read more

mrtaby

"Goodman GMPN080-4 fan speed change " , posted Mon 25 Jul 17:27

Hello, Can anyone tell me which wires to change around on my blower to get the highest speed? Or does anyone have a schematic for this blower they could email me? ... read more

chimneys

"Why 407C " , posted Sun 24 Jul 22:02

I have been seeing quite a lot of 407C commercial systems this summer, so much so that I would say 407C is becoming the leading refrigerant. I know the system pressures are about the same as 22 but It ... read more

Xenos
Webmaster

"Condeser fan stops after 10-15 min!!!!! " , posted Fri 22 Jul 20:12

I have ac that runs for short time and then the condenser fan shuts off because of what seems to be over heating, however, the condenser coils are clean, the filter is clean, the motor is new, the cap ... read more

moy druke

"carrier 30gxn screw chillers " , posted Fri 22 Jul 18:37

have a 30gxn160 chiller with a problem with circuit b economizerif any one is knowledgable with these let me know i would like to have and in depth discussion ... read more

freon john

"fresh air " , posted Wed 20 Jul 16:47

My church is having Two 3 ton heat pumps installed. The inspector says we need to have fresh air vents installed in the return lines. Can anyone give me some information about this? Does this defelt t ... read more

AC Ranger

"york condenser fan " , posted Wed 20 Jul 15:30

Have a York condensing unit where the fan cycles on and off. Compressor is running and unit seems to be holding temp fine but seemed unusual for fan to cycle on and off every 45 seconds or so.any ... read more

nhtess