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I also think you have a pressure switch related issue. Some manufacturers want to be sure the switch opens when the unit cycles off so as to avoid the possibilty of a welded switch reporting the...

Totally forgot about an automatic expansion valve. I think his problem is solved!

I think you would be able to use the suction line coming out of the box if you attach the temperature control sensing bulb to it in much the same way as one would an expansion valve bulb. You would...

Would it be possible to use a liquid line solenoid before the expansion valve with a temperature (or pressure)control in series with the coil?

It does not become virgin unless it is reclaimed (as opposed to recovered or recycled), and it is not technically reclaimed unless it has been tested for and reaches a purity standard known as ARI...

Glad to help. Happy New Year!

You will need something called a charging cylinder (sometimes referred toas a dial a charge). It's a calibrated container that allows you to accurately weigh the charge in. And yes, you do add 2oz....

ditto

A standing vacuum test is the last confirmation that your system is leak - free, but the ability to hold a vacuum does not guarantee your system is tight. It makes sense when you think of it this...

When I read "compressor saver" I thought of those little square black time delays that were so easy to sell before the advent of digital stats.

On a very hot day, the utility company may be dropping supply voltage (although they will never admit it). I've seen as little as 196 volts feeding a 208 circuit. If you drop voltage, amperage must...

Did you get your EPA Certification through NYCT?

Outdoor coil temperature is relevant because that is how the heat removed from the conditioned area is released to ambient air.

I don't know your husband's age, but this is a young man's work. Their is plenty of lifting, climbing, kneeling, and bodily contortion involved. After a number of years, the little nagging injuries...

The ability of the unit to hold a vacuum does not guarantee that the unit is tight. Consider that even under a perfect vacuum (30" hg, 0 psia) the greatest pressure differential between inside the...

Also used to prevent liquid migration to the compressor in an off cycle.

Often use a heat gun but be careful; they can remove paint.

It's also a real quick way to determine which of the unmarked breakers feeds it:whistle:

I agree Pro. But I actually held the check and felt it chattering.

Thanks Gas. It is a split with the compressor under the car body and the evap in the interior (passenger compartment) "attic". Also, it is a spring loaded check. Condensing temp was low, but I...

Greetings all. I have been asked for advice concerning an intermittent discharge check valve chatter on a subway car air conditioner. It is a Carrier Open Drive 10 ton R- 22 unit with a typical...

when I ws a kid. Sent to a no cool (resi) for my first call. Find no 24v to contactor, trace it back to stat. As I'm removing the cover, H/O proudly states that it's only a year old & he did it...

Don't be so rough on yourself. We've all seen this and did exactly what you did even though the little voice was telling us it might let the smoke come out of the transformer
:gah:
:cheers:

It was marketed under a few names. Mine specifically by GE. It's about 25 years old; still my "OLD RELIABLE". I have never tried it on HFCs because there was no such thing as HFC refrigerant when...

Two points to consider:
Even if you were to attain a 500 micron vacuum, that does not mean you are absolutely leak free. The greatest pressure differential between inside your system and the...

What are you going to pull a vacuum on? The system should already be charged and there is no field installed lineset.

Solenoid closed most likely, but were the txv strainers checked? If one clogs, they both will. Since the system is recovered, open the solenoid and remove the "guts" (diaphragm, plunger etc). Put...

If you experienced multple failures and they have all been electrical, an acid condition likely exists. At the very least, an acid test should have been performed in order to prevent condemning the...

Dirty evaporator would also make it hard to open a cover.

Typically, the tanks are rated for 50 & 30 pounds, so they can (legally) hold 40 & 24 pounds respectively.

Is the house very warm inside? Is there a panel open on the air handler? At 80 psig on the low side, you would have a coil temp of close to 50 degrees.
You specified that the a-coil is clean; how...

You can try switching legs of the compressor (reversing the motor rotation). Sometimes, if you are persistent enough, this will free it. You can also try reversing the rotation and energizing the...

Try www.hvac-pro.org.

They have a practice Universal Exam. I refer my students to it. It's not absolutely great, but it gives you an idea what to expect. Good luck!

Excuse my rusty-ness. To my recollection, Ice - o -matic machines go into harvest based on low pressure. At a cooler outdoor ambient, pressure would be lowered in a shorter amount of time, which...

If you tried tightening the packing nut without success, and you don't have or can't find the proper (graphite) o-ring, a piece of teflon "rope" wrapped around the stem, then tightened in place by...

I change it after every use, while the oil is still warm. There was a reason for this, but I honestly don't remember what it is.

Are you sure it's a leak and not moisture in the system? Time is not an indicator of sufficient vacuum. After you reach 600 microns, isolate and turn the pump off, then watch the pressure rise. If...

Have you checked the belt tension and/or pulley adjustment?

Also, if it is an air over motor, is it located in an area where the is poor air circulation?

edit -

Called Robinair. Tanks can be used, but a risk of overfilling exists. It will be necessary to weigh theses tanks as they're being filled.

My company just purchased 50 lb recovery tanks to use with the Robinair 17800B . The new tanks do not have a shraeder valve (in addition to the liquid and vapor valve connections) to attach a hose...

Thanks. This looks like the way to go. Hopefully one of the parts houses around here has them.:yes:

Went on a call today and found compressor terminals on r & s fried away with just roundish posts left (no flat area for clip to connect to). I replaced the connectors on the end of the wires and re...

Was repairing a 10 ton unit for a subway car with an ignorant supervisor breathing down my neck. Told him the unit was going to need an Illudium K-234 Vacuum modulator. He wouldn't admit that he...

Are you sure the guy's even around? Maybe he had some kind of extenuating circumstance (death in family, hospitalized etc...) and hasn't been able to respond to your calls. I know it's a longshot...

I felt the same as most with regard to Goodman equipment until we lost the Condensing unit three days before closing on the house we just sold. I was looking for the cheapest possible replacement...

You know that oil goodman uses in its shipping pallette that smells like refrigerant oil? I refused to accept units 3 times before I realized that all goodmans ship with that oil. But I've been...

Did it always do this? If so, your service capacity may be on the low side so that when the compressor reverses, the additional amp draw is taxing the panel. Does it happen all the time, or only...

Finally the voice of reason is heard above the din. This is the only response that was both correct and a reasonable solution what is going to be a common problem.

Did anyone perform an acid test on this unit? If acidity is not determined, then you are being misled by your technician. The pinholes are probably a result of environmental circumstances rather...

Very well "spoken". And absolutely correct.