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What should the a/c manifold gauge read when you hook up to low and high side of 06 nissan maxima

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If you do not know or your not sure, I recommend you take your car to a dealership service department.

Posted on Apr 25, 2010

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How and where to add freon to a1995 sedan deville


Verify ambient temperature is above 65 degrees F.

1. Safety> - safety glasses, long sleeves and gloves, (exposure to refrigerant can cause frostbite).

2. Attach hoses to manifold> assembly, (hi, lo, and fill).

3. Remove caps from service ports, (Low press. Larger tube from evaporator to accumulator - passenger side over fender well; High Pressure - smaller tube from evaporator along firewall towards driver's side). Verify service> ports are clean.

4. Attach low press. and high press hoses to proper service ports.

5. Start car>, reset low refrig code, and turn ac on high and fan on high.

6. Read gauges and compare with chart provided with gauge set.

7. If low and high press readings are both low, then system needs recharge.

8. To recharge, attach fill hose to can of R134a and slowly open low press valve>, (NOT HIGH PRESS VALVE), until low press side reads 40 psi.

9. When flow stops and pressures stabilize close valves> and disconnect manifold from service ports and refrigerant can. Replace service port caps.

Aug 19, 2015 | 1995 Cadillac DeVille

1 Answer

NUMBER OF POUNDS ON GAUGE FOR ADDING FREON LOW SIDE


it should reads from the manifold gauge on low side 38psi and 180 high side.

Aug 15, 2012 | 1998 Nissan Maxima

2 Answers

When i turn on the a/c,the compressor does not work


CHECK REFRIGERANT CHARGE. USING A MANIFOLD GAUGE SET. HOOK MANIFOLD GAUGE SET TO LOW PRESSURE PORT AND HIGH PRESSURE SIDE PORT. LOW SIDE PRESSURE SIDE SHOULD HAVE 25 - 36 PSI AND HIGH PRESSURE SIDE SHOULD BE 178 - 237 PSI. IF LOW SIDE PRESSURE SIDE READ BELOW 20 PSI THE LOW PRESSURE SWITCH WILL NOT TURN ON THE AC COMPRESSOR CLUTCH NEED TO ADD LITTLE MORE REFRIGERANT. IF REFRIGERANT LEVEL CORRECT CHECK AC COMPRESSOR FUSE AND RELAY.IF POWER GOING TO AC COMPRESSOR CLUTCH YOUR COMPRESSOR CLUTCH HAS OPEN WINDING. AC COMPRESSOR CLUTCH NEED REPLACING.

Aug 11, 2011 | 1997 Nissan Pathfinder

1 Answer

The compressor is working but it is not blowing cold air. air turn off once in a while. need to turn off motor and restart truck so the air conditioner can restart


YOU MORE LIKELY NEED MORE REFRIGERANT IN SYSTEM SOUND LOW FIRST HOOK A MANIFOLD GAUGE SET CHECK AC LOW PRESSURE SIDE AND HIGH PRESSURE SIDE.LOW PRESSURE SIDE SHOULD BE 34 PSI AND HIGH SIDE SHOULD BE 228 PSI.

Jun 03, 2011 | 2003 Chevrolet Silverado 2500HD

1 Answer

Where is the low side ac conection on a 2001 altima located. I found one conection but not sure witch it is. when I conected the 134 refill can, the little gauge on top went to the red high pressure...


If you are getting a high reading then you have a problem with the system. Only other thing is make sure you have the valve turned off, The gauge and R-134 connected and then slowly turn the gauge handle. Sometime these will give you a high reading if it wasn't hooked up correct. The system was modified so the gauge will fit on the low pressure side. Good Luck.

Dec 04, 2010 | Nissan Altima Cars & Trucks

1 Answer

Recharged ac now when i turn it on u can hear the ac sytem try to kick on then stops


It probably is over charged. Hook up a manifold gauge set & check the low & high side pressure when it tries to come on. Low should be 34-40 & high should be no more than 150 psi.

Jul 13, 2009 | 2002 Nissan Sentra

1 Answer

How do I service my A/C 2000 Chevy Impala LS


To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.

Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

Both low and high side readings are lower than normal, this indicates a cars AC system is low on refrigerant and is under-charged.

If both low and high side readings are too high, this indicates an overcharged system - too much refrigerant. This also can indicate that the condenser fan is not working, is too slow or the car is overheating and heat is transferring from the radiator to the condenser.

If you are going to by the recharge kit at an Auto Parts store, With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the freon and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 
Good luck and keep me posted, be glad to answer more questions you may have. 

Jul 02, 2009 | 2000 Chevrolet Impala

1 Answer

95 Deville - Low Refridgerant/AC Comp. off


To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.

Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

Both low and high side readings are lower than normal, this indicates a cars AC system is low on refrigerant and is under-charged.
If both low and high side readings are too high, this indicates an overcharged system - too much refrigerant. This also can indicate that the condenser fan is not working, is too slow or the car is overheating and heat is transferring from the radiator to the condenser.

Good luck and hope this helps, keep me posted be glad to answer any question you may have. And yes the A/C system on your car uses R143a and there is a A/C pressure switch along the low pressure line or on the accumulator, it looks like a oil pressure sensor with a two wire lead cliped on it. 

Jul 02, 2009 | 1995 Cadillac DeVille

1 Answer

94 civic a/c


Look at the LOW pressure gauge reading when the engine is OFF.

On an 80 degree day, the LOW gauge should read about 56 psi or higher if the A/C system contains an adequate charge of refrigerant.
On a 90 degree day, the LOW side reading should be about 70 psi or higher.
If the LOW gauge reading is less than this, the A/C system probably needs some additional refrigerant.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Jun 22, 2009 | 2003 Honda Civic

1 Answer

What kind of fittings are use to hook up manifold gages to the high and low side so the system can be vaccuated?


To evacuate, you need a set of gauges between the pump and the a/c system you only open the low side. The gauges will need to have the appropriate fittings for your system. After evacuation to about 21" of vacuum, watch gauges and make sure reading does not change (if it does likely you have a leak somewhere). Recharge through gauge set on low side as well.

Jun 15, 2009 | 1989 Chevrolet Corvette

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