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Style 48DCA-000093ZR : must I unload the freon,to change the low pressure swicht?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Carrier Infinity System...would low freon

Yes and yes....
Could be either and they act a lot alike...
So make sure you filter is clean... the evaporator coil is completely deiced, and the blower is moving the proper amount of air for the unit you have... 300-400 CFM/ton...

Then if it is still locking out on low pressure, you are under charged...
do not try to add freon your self...

How to add Freon to a Air Conditioner or Refrigeration System


Posted on Apr 25, 2011


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Pressure washer failed

What are the symptoms? Water in oil requires changing seals ( probably high and low pressure) Low , fluctuating pressure is probably valves need cleaning or replacement. Low pressure could also be worn unloader. Water leaking from pump is worn high pressure seals. Many possible failures.
Saying pump has failed is like saying my car does not work.

Feb 10, 2014 | Computers & Internet

1 Answer

Charging air conditioner

There is a lot to doing the job correctly, but sometimes with luck you can get acceptable results with minimum expense and effort. It all depends on how much Freon is left in the system.
The repair for a system with remaining Freon in it is a different repair job from a system that is empty. The Freon pressure keeps worse things from happening. You will find a fitting to add Freon on the accumulator(black oblong tank) or on a line close to that part. With the engine running and A/C engaged; you need to check the Freon pressure with a gauge.
If the A/C compressor is not kicking in, the connector on the low pressure switch needs to be disconnected and jumped with a looped wire. Add Freon if you have low pressure. Note the pressure because the low pressure switch has a rated working pressure and weak pressure switches can cut out early.
Fill the Freon to a moderate working level. You want the A/C to stay working longer which it will do when it is charged between the high and low pressure limits.
But if you find that there is zero pressure in the system, at a minimum you need to rent or borrow a Vacuum pump and evacuate the system. Then add Freon with a sealer and a small oil charge. Operate the system and drive 20 minutes minimum to circulate the sealant. Check pressure after 24 hours and top off the Freon charge.
If the leak did not seal, you will need professional help and tools to replace the leaking part. There are leak detectors, but some of the fittings require special tools to change.

Jul 16, 2013 | 1996 Ford Thunderbird LX

1 Answer

This compressor is in my aquarium water chiller. When I plug in the chiller, The compressor starts then goes off. a few seconds later it starts again then goes off. It continues to do this. I have changed...

The Freon is probably a bit low. When the compressor draws from the low side the extreme low pressure trips the low pressure switch, shutting down the compressor. With compressor off the pressure equalizes the low pressure switch opens and the compressor switches on. murf427

Aug 02, 2012 | Panasonic QA125K29CAU6 Refrig...

1 Answer

Low pressure valve for ac

In general the Low-pressure valve is a safety feature to protect the A/C compressor from damage. The valve can be changed without too much effort, sometimes the spring inside can become weak and activate at a different pressure than designed. With strong grip, it can be changed by hand, using care not to twist the a/c lines it is mounted on. It has an electric connector which has clips to secure it and they must carefully be unlatched.

There are 2 valves which are similar in appearance and the low-pressure part is closest to the black oval tank or even mounted on the black oval tank. You want to be sure to change the correct one. This will only help you IF the original part was defective.

When this part is working properly, it prevents the A/C from working when the Freon is low. If the Freon is low there are many possibilities why this happened. Each car is an individual case. Depending on the size and location of the leak, sometimes an additive in a new can of Freon with a sealer/conditioner can help. Sometimes too much air leaks into the system and it needs to be purged and you start over fresh.

Autozone has loaner tools to create a Vacuum in the system, measure the pressure in the Freon lines and do other repairs. It is a free program with refundable deposits.

You can go to an autoparts store and ask to see the correct part. The clerk may even look under the hood of your car to show you where it goes. If the valve is bad, replacing it can fix the problem.

You should not lose but a whisper of Freon when switching this part. But if the part is good, you need to address the low pressure. Freon has gone up so much that a mistake is costly. Use to be that you would try adding Freon first to solve a problem when Freon was $2.50 a can.

Also watch for the size of the can of Freon. Many shady ads will sell you short cans of Freon at a "discount" price. You pay less but get less.

Since each car must be judged by inspection results, its a specific call on what to do.

May 28, 2012 | 1994 Buick Skylark

1 Answer

My Honda pressure is stuck in low pressure mode. How can I get it into hogh pressure mode?

You should check your pressure washer without the hose on it to make sure the gun isn't clogged. If the unit still sprays at low pressure with the gun and hose removed then most likely your unloader valve is stuck open. You can lookup a parts breakdown for the pump on your unit and locate the unloader so you can remove it and clean and lightly coat it with silicone grease. Then a dozen quick load/unload cycles should help properly seat the unloader parts.

Oh...and if the unit does make full pressure with the gun and hose removed you should take the hose off the gun and see if there are any obstructions in it. Hard water, corrosion, stones....something needs to be cleared!

Take all safety precautions while handling your washer! Good luck!

Nov 17, 2011 | Honda Garden

1 Answer

My ac is blowing hot air. I've checked the gas and it's full. The compressor seems to cut on and off about every 10-15 sec. Do I need a new compressor or do I have some sort of fault switch? Any...

Hello, You need to check how much Low end pressure you have. The Low pressure cutoff switch will disconnect the compressor if the pressure is too low. The high end pressure switch will do the same thing for extreme pressure.

Sometimes the Low pressure switch will get weak and cut off the system too early. Just change this switch which will come out with only a slight puff of Freon being lost. You can jump the connector with a U shaped wire and bypass the Low pressure cutoff switch. If the compressor works better and does not cut out, it can still be low on Freon or have a bad Low pressure switch.

However, if the compressor cuts out a Second time with the Low pressure switch bypassed, the system is probably overcharged and the HIGH pressure switch is cutting off the compressor. You need to purge some Freon out of the system if High pressure is indicated.

Where it gets tricky is the Compressor will compress both Freon and Atmospheric air. Your efficency drops when the Freon is displaced by Atmospheric air. You will need to find the leak in the system which is allowing Freon to leak and outside air to enter the system. You will get a pressure reading with any gas in the lines.

There are Leak detectors and sealers for the system. I hope you just have a bad low pressure switch which is the easiest solution.

Jun 25, 2011 | Ford F-150 Cars & Trucks

1 Answer

Replaced A/C compressor and the clutch still does not engage.

Verifies if corrienete to coil if freon is missing the swicht low disconnects the current in the coil of the clucht

Jul 03, 2010 | 1998 Ford Escort

1 Answer

I have a 1996 ford contour with a/c problems.Laid off and cannot afford to take to shop. a/c won't kick on.Tried bypassing pressure switch and it kills car.Comp. not locked up.Thermostat changes from heat...

Yeah sometimes the newer cars have a different style of compressors that if you try to bypass the pressure switch then nothing will work. Have you tried to put freon in yet? Sometimes if it gets low enough on freon it won't cool. Make sure your a/c compressor has oil in it too. No oil means a new compressor automatically. Just because it's not locked up doesn't always mean that there is nothing wrong with the compressor. There could be a leak on the seal where the clutch is.

Sep 20, 2009 | 1996 Ford Contour

1 Answer

How do you clean the unloader valve on a power washer pump?

The unloader valve usually is replaced. I dont know if you can get o-rings for it. But if you want to take it apart, there will be a crown or cap style nut just below the spring. Unscrew it completely and you will be able to remove the spool. There is just a series of o-rings on it.

May 10, 2009 | Karcher 2500 PSI Pressure Washer

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