How To Repair Lennox Air Conditioner
Need to fix your motorcar'south air conditioner? Nosotros are a squad of ASE certified mechanics that have created this guide for y'all then you tin can understand how the system works and what to look for when it doesn't. We also have included pop repair guides with videos which will assist y'all stream line your repairs or see what you lot are paying for when taking your machine in to a repair store. Let's jump right in! When looking under the hood at your car'southward air-conditioner it might seem complicated just it'southward non. Once you know how it delivers cold air you will meet information technology's actually quite elementary. Your heater and air conditioner (HVAC) does 3 jobs; absurd the interior of the car, heat the interior up and defrost the windshield. All 3 modes work together as a complete system. The climate control system is controlled by a principal computer which houses the controls for the system and sits in the dash in about cases. This calculator gives commands to the compressor to start pressurizing the refrigerant along with the blend door actuators which straight air catamenia from the flooring, mid and defrost vents. These air door actuators too control air temperature by mixing the hot air from the heater and the cold air from the Air conditioning. When ane part of the system fails to operate like the air conditioner and then 1 part of the organization stops working in this case the cold air. SPONSORED LINKS The Ac system has iv basic parts: A compressor, which is powered by the engine using a serpentine belt. On hybrid cars the compressor is electrically powered and does the same functioning. A condenser which is located in front of the engine radiator and cools the refrigerant from the compressor before it heads to the evaporator located inside the vehicle. This is where the loftier pressure liquid is released into the evaporator as a low pressure gas and where the coldness is created. The blower motor and then circulates the air throughout the interior. Before you start doing repairs on the system information technology's a practiced thought to see how the a/c system works. Start with the car on level footing with the manual is park and the emergency restriction ready. The engine should be off, but warm. Clothing prophylactic goggles and gloves to protect against injuries. Never loosen or disengage any hoses or fitting before discharging the organisation of refrigerant. The organisation does contain a slight corporeality of oil which can be expelled while discharging. You volition run into tools and supplies used in the following guides that you will be able to find throughout and at the end of this commodity, also a list of specific repair manuals. One matter to remember is all air conditioner systems work on the aforementioned principle. Okay, now that you have had a crash course on how the organization works let's approach this problem like a mechanic would. SPONSORED LINKS If air is not blowing from the vents it is not the trouble of the refrigerant recycling system (A/C) and can be attributed to the blower motor or a vent control actuator. Here is how to tell which; start the engine and plough the air conditioner on. Adjacent, motility the fan setting from the highest to the everyman. If you can hear zippo it is a problem with the blower fan. If you lot tin hear the fan but no air is forced through the vents, or if the air is being generated from the wrong vents this is an actuator problem. If air is bravado from the correct vents but is not cool (no common cold air - bravado warm air) continue downwards the guide. When the air conditioner is switched on three things brainstorm to happens, the compressor, blower motor and vent actuators all receive an electrical bespeak to turn on. This causes the compressor clutch to engage while working the internal parts of the compressor pump. This pumping action compresses the refrigerant so it can circulate around the system. The following step are presented in lodge of popularity. As your vehicle ages the refrigerant level should exist maintained and added besides insuring that the system stays full. Because this system is pressurized kind of like a tire it volition need to be recharged every bit it ages. Recharging the organisation is not to difficult and can be done in about 20 minutes. SPONSORED LINKS If the system is low and then you can recharge and monitor how long the accuse lasts. If the system lasts upwardly to 6 months and so some other recharge might outweigh repairing the system which you tin practise for virtually $35.00 yourself. A sign of a organisation being depression on charge is that information technology will produce white vapor from the vents much like your home freezer. This is considering the force per unit area drop inside the evaporator is to excessive causing information technology to "ice up". Recharging the a/c arrangement will prepare this problem. To check the organization's "state of accuse", connect a gauge or charge kit to the low side hose service port to read the static pressure. This will show the pressure in the arrangement. If the system is flat there is a refrigerant leak that must be discovered and repaired before recharging the system. SPONSORED LINKS If the organization is full and the static pressure (engine off) is between 70 and 90 psi so keep downwardly the guide of checking the system. In this image the engine is running but the clutch is not engaged. With the organization on this can mean i of two things, kickoff the system is low on charge and and so the compressor volition non turn on via a pressure switch located somewhere on the depression pressure side of the system. Or at that place is an electric trouble of some kind ie: blown fuse, relay and clutch engagement curlicue or climate command figurer shorted. If when you turn the air conditioner on there is a loud screeching noise the compressor has locked upwardly and needs replacement. Before we keep going at that place is an additional style of compressor that are featured on German language cars (BMW, Mercedes Benz and Volkswagen) which does non have a clutch. One of these compressors is featured on the epitome beneath in which at that place is no clutch and no wires to an activation gyre. As you can see the portion of the pulley hub where the clutch would be located is direct bolted to the input shaft of the compressor. These compressors have an internal valve which is located at the rear of the compressor to begin the process when activated. For these cars at that place will exist one variable in testing which we volition get to farther downwards in the guide. On clutch mode compressors with the organization still on and set up to the coldest setting and highest fan speed locate the compressor. Using a flashlight and inspect the clutch performance it will be doing 1 of two things; first, it volition be cycling on and off which means the system is low on charge or the condenser fan is not operating or there is blockage in the expansion or orifice tube. SPONSORED LINKS If the clutch is doing nada then its time to connect a gauge or charge kit to come across if the system is completely flat or is just then low on charge. When the arrangement is low or overcharged a pressure switch tells the compressor when to shut down to avoid impairment. On internal valve compressors i.e. German cars y'all must use a test light to see if the signal wire is getting ability or not. This style of arrangement does not cycle when it'due south low it just shuts downwardly then its best to check the systems charge. Commencement the engine and set the air conditioner to its coldest setting. The showtime thing to look for is the condenser fan beingness on (if equipped). This fan should turn on within a minute of the Ac system being switched on. If this fan is not on then this is a problem that must be checked out. If the vehicle is rear wheel drive and has a mechanical fan look to see if the fan is "freewheeling" which is an indication of the fan clutch being bad and needing replacement. The condenser must take air beingness pulled or pushed through information technology for the system to work. Find the climate control console to come across if there are any lights that are blinking which indicates there is some kind of failure in which a lawmaking must be read. Each method of retrieving these codes is different to each manufacturer. These codes will guide you to the circuit or organisation that is having a trouble. If everything looks okay on the console or the panel lights are out completely please proceed down the guide. Locate the auto's fuse console under the dash or power distribution center nether the hood. Using a examination light cheque all related fuses such as the BCM, climate control, heater, blower motor and for the air conditioner. You can use your motorcar's owner's transmission to help locate the fuse. If the new fuse blows in one case information technology'southward been replaced there is a short in the organisation. Well-nigh of the fourth dimension this brusque can be related to the compressor clutch coil in which case it needs to exist replaced. SPONSORED LINKS If all related fuses are okay the next part in the system that has a loftier failure rate is the a/c relay. This relay supplies main ability to the compressor via the system fuse. Locate the relay in the fuse console or power distribution center using the owners transmission. In one case located check the terminals of the relay for ability and ground and and so replace the relay to recheck the system. Yous tin swap this relay for a like 1 in the car such as the ability windows or door locks to test it, many of these relays are the same. A pressure sensor is used to measure the amount of refrigerant is in the organization. When this sensor goes bad the compressor will non plough on. To test this sensor remove the wiring connector and insert a jumper wire betwixt the ii terminals of the connector. If the compressor turns on the sensor is bad or the system is low or overcharged. If nothing happens utilize a exam light to come across if there is 12 volts at ane of the wires. If no power is present suspect the climate command computer existence bad. If you lot accept perform all of this tests and the system is still non working a pin to pin voltage and continuity check is in club. This test sounds harder than information technology is, using a wiring diagram for you car you basically you lot are required to examination each wire for ability or ground and and then continuity to make certain each wire is fully connected. SPONSORED LINKS If the engine is overheating or low on coolant the air conditioner will be weak or not piece of work at all. If you have been driving for old and you noticed the system stops working the starting time affair to check information technology the engine temperature estimate or warning light. Tree leaves, plastic numberless and dirt can get logged in the condenser hindering the systems performance. Remove any obstructions such as plastic bags from the condenser area. As well use a garden hose to clean the condenser with a loftier pressure nozzle from fourth dimension to time. This works actually well and helps the air conditioner work more efficiently. The compressor is the chief mechanical part of the system which is driven by the engine'south serpentine chugalug. This belt should exist in good working order and replaced if worn. Some cars are equipped with the cabin air filter which is much like an engine air filter that tin plug causing restricted air menstruation. This filter should be replaced when air flow becomes restricted. If repairs have been made, the arrangement will need to be vacuumed down and recharged to remove damage causing moisture. If you don't vacuum the system the A/C will not be as cold because of the air that is trapped inside the system in one case it has been opened. If you take any questions nigh car air conditioners please visit our forum. If you lot need car repair advice please enquire our community of mechanics are are happy to help. SPONSORED LINKS Article published 2022-02-02 Introduction
Earlier Y'all Begin
Why Isn't My Air Conditioner Working?
Footstep one: Bank check the A/C System Charge
Footstep two: Check the Compressor Performance
Step iii: Check the Condenser Fan
Footstep 4: Check the Climate Control Electric System
Picket the Video!
Maintenance
Source: https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak
Posted by: nelsoncauseveras.blogspot.com
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