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Scleros, Thanks for the help, I can tear down and rebuild a 100 ton AC unit blindfolded but I don't know much about computer video boards. The two monitors are less than five feet from the...

My wife owns a fitness center and her computer has to have two monitors. The board went bad and I can't find the exact replacement. It's a MSI 8959-010 Geforce FX5700LE Video card. The...

I guess you don't understand how a TXV works and what superheat is and what happens to a system when the ambient temperature changes. Your correct ARI list the TXV as a necessity on SOME...

Trane, Carrier and York no longer approve P-traps on suction lines. I just went through this with a new Trane 70 ton split unit. I always used double risers with P-traps for years but, it's no...

Check with your equipment manufacture, many of them no longer approve suction line traps. Slope your suction line towards the condensing unit and depending on how high the vertical pipe is and...

I've never heard a unit make this much noise that could be that loud and annoying. Usually the pistons that meter the refrigerant don't slam open and closed. Has anyone checked the superheat? Is it...

I agree, $800.00 is too much just to replace the motor and capacitor. Unfortunately, there are to many companies that prefer to sell new equipment instead of repairing equipment that's still in good...

All the water should always go down the condensate drain. You most likely have a plugged or restricted drain line that backs up after several hours of usage. There should be a cap on the drain line...

I'd start by checking the contactor in your outside condensing unit. If possible, next time it happens disconnect one of the small 24 volt lines that goes to the outside condensing unit. If you...

There's no reason that the orifice shouldn't cool down your house as long as it's the correct size and isn't obstructed with something. If your system was designed properly and the condensing unit,...

What fan works? The inside one or the one on your outside unit.

I can't tell you what wires go where, there are to many possibilities. If you give us the make and model of the motor, that will help. The diagram on the motor should tell you what wires go the...

There should be a circuit breaker or fuses just for the outside unit. If you have a main electric panel, look for a two pole 30 amp breaker. If you have a fuse box, you should have two cartridge...

The capacitor needs two wires to work properly. Usually theirs two brown wires for the capacitor, one of them may have a white stripe on it. Your new motor should have a diagram on it that will...

As hvacservicetech mentioned it may need a hard start kit. If you have any other 30 amp circuit breakers in your breaker panel (maybe for your dryer or hot water heater) you might try exchanging it...

Does the compressor shut off when the fan quits? If so, you may be low on refrigerant, the low pressure switch shuts off both the compressor and the fan after it runs for a while. Depending on how...

I don't believe most homes are under a negative pressure. Unless you are running an exhaust fan that's discharging a lot of cfm, it takes a real well sealed home to create a negative pressure. ...

If the old unit you replaced was a 4 ton unit and it worked fine, there's no reason the new 4 ton unit shouldn't do as well or better. It may be more efficient and have a new refrigerant but a BTU...

It's usually oval or round and is usually attached to or near the squirrel cage blower. Normally they are silver colored and have terminals on the top with two or three wires. Be real careful, they...

Do you have 24 volts going to your condensing unit? If you do, check for a open or bad controls. Some units have high pressure switches that have a reset buttons on them and some have a time delay...

Sounds like telephone wire and not thermostat wire...

If your old 4 ton unit worked fine, the new one should work as well. If you had to little of air flow you would be freezing up the coil. Too much air can usually be controlled by slowing down the...

If you replaced a 4 ton unit that worked fine for almost 30 years, there shouldn't be any problem with air flow. This is a package unit with factory matched blower, coil, metering device, factory...

Is this unit replacing one that went bad? If so is it the same size (4 ton)? If the one you had replaced is the same size, air flow shouldn't be a factor unless they changed something. They should...

hvac1000 is 100% correct. If you try to charge it so the suction line is real cold, you will probably over charge it and that will destroy your compressor.

It's obvious that your service tech doesn't know what he's doing. I believe PGX is a package system with gas heat, (not sure) if so, he shouldn't have had to do any brazing. I would be concerned...

A CKL30 is just AC only and if you blow the fuse when you turn it to cooling, you most likely have a problem in your condensing unit. It's probably a bad condenser fan motor or compressor.

Depending on the manufacture, you can usually make it work. You may have to adjust the blower speed to increase or decrease the cfm. To be safe you should check the specifications to see if they...

It sounds like a bad blower relay, capacitor or blower motor. If the outside unit comes on, you know you have control voltage so the fuses should be OK. Does the blower motor hum or sound like its...

It sounds like you have a thermostat problem. If neither the fan or the outside condensing unit comes on when switched to cooling, check your connections and thermostat program. You know the blower...

See the following web site, www.thermostatshop.com/manuals/VisionPro%20Owner%20manual.pdf it explains how to unlock the thermostat.

aterbrys0528, Don't use a bigger fuse. If the fuse blows when the ac is turned on you probably have the same problem as Hokiez had above. You shouldn't blow a 5 amp control fuse unless you have a...

I'd pull both of the wires off the contactor and then try it. Make sure you pull off both of them off just in case the coil is grounded out. Good Luck

You have something in your control circuit that's blowing the fuse. Check the small 24 volt wire that goes out to your outside unit for any shorts. If that appears to be in good condition, you most...

You must be referring to the low voltage fuse and not the line voltage fuse. If the 5 amp fuse only blows when you switch it over to the cooling mode, you probably have a problem with the condensing...

There should be a tag on the refrigerator that will tell you what your amperage usage is when the compressor is running. You can multiply the amperage by the voltage (115) and that will give you the...

In order to use the FAN switch on your thermostat, you'll need at least 3 conductors. The third wire will be needed to connect the G terminal on your thermostat to the fan relay.

If you leave the heat and cool switch OFF and put the fan switch to the ON position, will the blower stay on or will it go off after a while. If it stays on and doesn't go off, you probably have...

Check your gas supply feeding your boiler.

Natural & LP Gas are usually measured in Inches of Water Column "W.C. and not PSI
Unless you have a real big big boiler you don't want 12-15 psi.

Depending on what wattage, Honeywell makes one T651A2028 SPDT 35-90 degrees, White-Rodgers 1A10-651 SPDT 36-90 degrees, & 1A16-51 36-90 degrees. Ranco also makes some SPDT thermostats. Check any...

Don't run your refrigerator to long without the condenser fan running or you will also be replacing the compressor. Without the fan running, your refrigerant head pressure is to high and it will...

It could be several things that's causing it to hum. It may be the condenser fan motor or something more serious like the compressor. Is it still cooling OK? It also could be the motor on your...

I'm with you, I'll still put a R-22 unit in my own house before I would a 410A. I still bet there will be several good drop in EPA approved replacements in the near future.

Make sure your not blocking any of the air vents in your freezer. Most side by side refrigerators blow cold air from the freezer side over into the refrigerator side. If you block or restrict the...

If the second contractor measured your house and determined you need a 3.5 ton unit, I'd go with him. A rule of thumb is 1 ton for 600 sq. ft. but that's not as accurate as actually figuring out...

If it's not cooling and the compressor is running, call your service company, don't run the unit anymore. You are probably low on refrigerant and you can damage your compressor if you run it with a...

Good Point... check with your electric company, I was shocked when I moved South and found out there is "NO" demand meter on three phase. If you already have three phase it won't make much...

I would go with a 3 phase because of the advantages of 3 phase over single phase. Three phase won't require as large of wire size as a single phase unit to install, three phase won't have a...

Where did you hook your low pressure hose? If you connected it to the suction line at the valve where it hooks to the unit, I'll bet your in the heating mode. When you run the unit does the suction...

Is your condensate drain piped into the house plumbing system or does it go directly outside? Is there a condensate trap? Where is your air handler unit, in your attic or basement. Are the covers...