I think I'm OK with the refrig part of the system, but I'm not experienced with the automatic electrical stuff in the newer type cars. Higher Pressure on both the High and Low side may indicate an overcharge or lack of cooling at the Condenser. 3. Let the system grasp the vacuum for around ten minutes. Dale from South central Oregon on September 02, 2019: I have an '06 Dodge cummins. So, it was pretty low. This could be a bad TXV/H-block or blocked Orifice Tube depending on your system. If the sight glass is clear liquid the system is fully charged. Playing next. Didn’t read anything on here about normal high side but high low side. Buy custom written papers online from our academic company and we won't disappoint you with our high quality of university, college, and high school papers. The compressor will shut off once the low pressure triggers the low-pressure switch. Any suggestions? Once you have to vacuum pump connected, you will need to evacuate moister and air out of the system. Many people purchasing RVs have no real camping experience, so RV campgrounds are being inundated with requests for their people to do things that are the RV owner's responsibility. Question: I charged the A/C system. What is up with the high side? When the controls are moved, a small electric motor buzz can usually be heard. Lower pressures may indicate low refrigerant level or a weak compressor. Jack Leg DIYer. Using an electronic micron gauge like the BluVac+ Professional and its accompanying application will show you the … I'm thinking a bad compressor could this be right or something else? 1, Set the AC controls to MAX and RECIRCULATE 2. What happens when the system runs, do the gauges both move? Victor from Abuja, Nigeria on August 18, 2020: I m working on a 2011 model of a Kia cerato.. the AC cuts off when the vehicle accelerates even while the clutch still working. Air Conditioning . This will make sure there is the right amount of refrigerant and no contaminants (air). low side is 85 high side is 150. any suggestions? How hot should the high side line be if you put a IR temp device on it? It this a partial blockage or is it freezing up somewhere creating a blockages or poor cooling fans? All liquid lines are measured, “Additional Refrigerant Charge” is calculated and weighed into the system, breaking the final vacuum Alternate: 50% (trim charge) of the calculated charge weighed in for “Auto Charge” operation 5. on an R-134a system. Watch How to evacuate and "pull" vacuum on an R134a car AC system - Drusillaoliphant on Dailymotion. It is recommended that this be done when the temperature is above 80 degrees. Overcharging the system will also raise pressures. So, replaced fan module with junk yard module ($25 for part). Briandl79. To control these doors a variety of actuators have been used such as: Service Tip: A common problem with all the actuator types are paper clips, pens, keys and other foreign objects falling down into the heater box from the dash defroster vents and jamming the doors. The air inside cab is down to 50 degrees. I don't see where dead battery and jumping would be connected to a vent issue. ok with the engine off the gauges read 100 high and Low, Engine running both front and rear Low-45 High 250-275, Engine running Front only turns off at Low 25 High 200 turns back on Low 45 High 150. This cycle continues. 50 psi on low pressure and 180 psi on high pressure with an outside of temperature of 75F, what does this mean for diagnostics of an AC system? They should be the same because the high and low side pressure equalize once the compressor shuts off. Question: How about if the static pressure is not equal. Then I had to turn off ac and turn back on. 2) The orifice tube, expansion valve, compressor reed valves or stuck or there’s a severe restriction somewhere in the system that’s preventing the pressure from equalizing. In most cases, their diagrams are right from the factory manuals. You can’t accurately diagnose your car’s AC by using just the low-pressure gauge on a recharge kit because you’re only seeing pressure on the suction or low side of the entire system. Degassing removes non condensibles which cause increased head pressures and increased operating cost. I have an R-12 AC system that seems to be completely empty. Not enough information but, sounds like a stuck open TXV/H-block. Answer: This means your low side pressure is above 150psi. DIY Auto Service: Air Conditioning (AC) System Operation with TXV or Orifice Tube, DIY Auto Service; AC System Service and Component Replacement, DIY Auto Service; AC System Diagnosis by Symptom. If the low and high side are about the same, the compressor is not working. What happens behind the scenes will shock you. Air Conditioner Installation . Mike Thomas (author) from Phoenix, AZ on July 21, 2018: The readings seem to be very high for the system not running. Does the condenser have bent or dirty fins? Just yesterday, the AC went on the fritz. Let us Help You Repair your Air Conditioning System and Save Money! The low side should feel cold if everything is working no matter the outside temp. When I to to recharge with R134A, the system isn't drawing in freon from the can... maybe 8 oz. The use of the propane/butane is only to find the leak, since it will be … Do you think the expansion valve is stuck open or check valves in the compressor. Ideally a vacuum pump used to evcuate an automotive a/c system should "pull" a vacuum of 29.5 or higher. AC System Diagnosis. The AC in this truck has always been little Siberia. Moisture and other contaminants that are not removed can wreak havoc on system internals over time and can cause premature failures. Answer: I assume it is an R12 system that has been converted to R134a. Can I know what is the problem?. Put my gauges on 2015 Chevy pickup and have 30 low side and 200 high side 90F ambient. Floor mode typically for heater operation since heat rises. Could it be the hi pressure switch? If they did, use a black light flashlight and the leak will show up bright yellow/green. 2003 honda element. The system is probably leaking. Determine that the car's air-conditioning system contains pure refrigerant before discharging, or evacuating the system of refrigerant. Go to MyJiffyLube App; Vehicle AC Evacuation and Recharge. If you have dual controls try moving it from. What could be the problem? Yesterday when ambient temp was around 100 I had a low side pressure of 52 and a high side of 250. The car is a 2006 Hyundai Accent. This repair pays off in the long run as not only is it much more tolerable with functioning AC, the AC system can actually keep you safe if the vehicle breaks down in a hot environment. Charged by weight, first can 12oz, low side 25-30 psi with high side at 150 psi. Static pressure on low side is 50 high side is 20, temperature along southern coast of NC is 62*. Why would they call it a bypass belt if that is the case? Mike Thomas (author) from Phoenix, AZ on July 03, 2019: I would start from scratch and drain evacuate and recharge the system with the correct amount of refrigerant. The clutch doesn't click in? The lower high side pressure may be from an undercharged system and the TXV is keeping the low side at 30 PSI. Turn on the key and let it reset for 1 minute. Any thoughts? I vacuumed the system and put new refrigerant. Hot in, cold out is restricted. Mike Thomas (author) from Phoenix, AZ on June 17, 2019: Sounds like the system is undercharged and the compressor is either not kicking on or a bad compressor. The AC and Heater operate out of the same box or plenum typically under the dash. on your gauge means the refrigerant will produce about 32°F at the evaporator (as long as the orifice tube/expansion valve is operating properly and there’s no air in the system that’s artificially inflating the pressure to 27-psi).

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