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System pressure to high - Heating & Cooling

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Hi,
Either the condenser coils are dirty or the system is overcharged...
Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

Air Conditioner Trouble - Review the Possibilities

heatman101

Posted on Sep 30, 2010

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Holden Cruze Diesel low fuel pressure. High pressure pump replaced. Low pressure pump working fine Very little fuel coming out of high pressure pump outlet


!st of all unless you have the experience and the correct tools do not play with the high pressure side of the fuel system. The pressure that is created on the high side is such that will cause serious damage or fatility "Seriously". The system needs to be sealed for the pressure to occure if air is in system" no" presssure.
If lift pump is working(can you hear it?) Is it exiting fuel filter and arriving at inlet of high presure pump at correct pressure. (if not replace filter Use Genuine part. If still no good lift pump or power and earth suspect check. Any engine check lights on? if so use a code reader.(im assuming no light as you haven't mentioned it). If all is good to high pressure pump then you are looking from pump onward. Is this an issue that has just occured or have you purchased vehicle in this condition. Any unusal noises The high pressure pump is driven by camshaft is it actually turning the pump I have come across fractured cams or drives. if ok advise holden to check from here on there may be an electrical issue or injection issue possibly allowing air in system or shutting the pump down. You can check the whole sytem for visible leaks and vacuume connections. good luck.

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Ac pressures


134a System Pressure Chart AC Pro according to this chart your compressor is faulty your low pressure line is high and your high pressure line is low

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I changed the ac compressor and dryer pumped it down and charged the system the compressor comes on for 3 seconds and cuts off. The clutch does not stay in gage. What could be the problem now?


Sounds like it's shutting off due to high pressures in the system. Do you have gauges to read the system pressures? One thing that would cause this is too much freon in the system, or too much oil. Did the compressor come with oil in it or did you add oil to the system? Too much oil and/or freon will give high pressures and the high pressure switch will shut the system off. Or the high pressure switch could be damaged, maybe even unplugged is a possibility. If it is plugged in you could try unplugging it and seeing if the compressor keeps running for longer than 3 seconds, if it does pressures might be too high. It could also be a bad relay getting hot and kicking off. Try switching relays and see what happens. Another possibility is the low pressure switch but not too likely in this case.

When the compressor shuts off, can you turn it by hand? If not, high pressures or even a bad compressor are possible.

Lot's of possibilities. Just have to wade through them. I'd start with the relay and then check the pressures.

Good luck.

Jun 21, 2014 | Cars & Trucks

1 Answer

Condenser fan not engaging when A/C turned on. All fuses and relays look fine. Tested fan with eternal power and it runs.


Possibly low on refrigerant. When system is low on freon, it does not build up enough high side pressure to engage the condenser fan . When pressure is high enough. a high side pressure switch kicks on the cond. fan to maintain high side pressure. Have the system evacuated and recharged to proper level. A system dye can be added to check for any possible leaks.

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1 Answer

High Pressure Switch replacement


typically your high pressure switch should be located on discharge line in order to replace it if you do not have isolation valves. you will need to recover refrigerant pull vacuum on system then replace high pressure switch. recharge system

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1 Answer

Location of ac high pressure cutout switch on a 97 Plymouth voyager. Could it be a different problem? Had to replaced the PCM and a couple sensors because of a short in the wiring cluster. Now the ac...


HIGH PRESSURE CUTOFF SWITCH LOCATED ON AC COMPRESSOR DISCHARGE LINE LEADING TO THE CONDENSOR.THE HIGH PRESSURE CUTOFF SWITCH WILL CUT OFF THE AC COMPRESSOR IF SYSTEM PRESSURE RISES TO HIGH CAUSED BY RESTRICTION IN THE REFRIGERANT CIRCUIT OR OVERHEATED CONDENSOR.MAKE SURE COOLING FAN IS RUNNING WHEN THE AC SWITCH IS ON.THE COOLING FAN KEEP CONDENSOR COOL, IF COOLING FAN DONT RUN.YOUR AC WILL STOP BLOWING COLD AIR.HAVE THE REFRIGERANT SYSTEM CHECK OUT.MAKE SURE YOUR LOW SIDE PRESSURE IS 10 - 37 PSI. THE HIGH SIDE PRESSURE SHOULD BE 112 - 210 PSI. CHECK THE AC COMPRESSOR CLUTCH FUSE AND RELAY.

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1 Answer

Temp off air coming out of register 74 degrees suction line temp is 42 degrees but high side line isnt warm dont look like it is wanting to take freon either compressor is running new system low side is...


Hello, what is your high side pressure? A bad compressor will show abnormally high low side pressure with abnormally low high side pressure. That 45 low side pressure is low And superheat high. If you high side pressure is normal toma little above normal but the low side remains low you have a restriction in the system, that might be why it's not taking in tne freon. Let me know you high side pressure

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System 3 in-door with system 4 out door inverter. all in door unit show error code CH24 pls help


CH 24-Splits and Multi Splits = High or low pressure trip. Low at 1 bar High at 35 bar check pressures. Multi V = High pressure trip.

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1 Answer

How do i hook my manifold gauges to my residental condensing unit to check pressures


The AC manifold gauges set have the three chambers: the low pressure chamber (left side), utility chamber (middle), and the high pressure chamber (right side).

When technicians connect the HVAC manifold gauge to the air conditioner units, he connects the low pressure side of air conditioner unit to low pressure gauge side.

If he wants to read the pressure in discharge line he connects the high pressure gauge hose to the air conditioner high pressure side.

The utility port (the middle chamber) is a place you connect the hose to vacuum pump, recovery units or add or remove refrigerant from AC units.

Air conditioning gauges is used to measure air conditioner units pressure within closed-system to evaluate or troubleshoot the AC units. Gauges manifold set is the most frequently used item when it comes to refrigerant or pressure.

Air conditioning gauge set allows the HVAC technician to check AC units operating pressures, transfer AC refrigerant, pressure test system, purge the system with nitrogen, and perform other necessary tasks.

The gauges manifold set includes the hoses, the manifold, the valves, the compound gauge (low pressure gauges) and high pressure gauge.

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1 Answer

Curious to know about high pressure switches


High pressure switch use to detect the high pressure in the system. It is use to protect the unit from high pressure during operation.

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