View my complete profile My 1992 Honda Civic recently developed a strange problem where the engine would idle badly and sometimes stall when the air conditioning was being used. Oddly enough, the problem turned out to be a non-functional condenser fan. Presumably, the compressor would pump the high side of the system up to an abnormally high pressure because the system was unable to dissipate heat from the condenser. Eventually the mechanical load from the compressor was so great it would cause the engine to stall. I would have guessed there was a high pressure limit switch that would deactivate the compressor, but maybe not.In any case, this is an R12 system, and I did NOT want to open any of the freon lines. It had been working great ever since I bought the car (until this recent problem), and I did not want to mess with it. Luckily, it's possible and not too difficult to change the fan motor without opening the freon lines.The fan shroud is bolted to the condenser with two 10mm bolts near the top facing into the condenser.

There is also a small bracket on your left that has two 10mm bolts to hold the bracket to the condenser and shroud. I removed all four of these bolts, two bolts that held the shroud to the car's frame at the top, a bolt that holds a freon hose to the shroud, and also a bolt that holds a relay to the frame (on your right).The shroud can be lifted up and out of two pockets that are formed into the metal of the condenser. It cannot be fully removed from the car because there is a freon hose in the way, and the hose cannot be moved. gas furnace ac unitsInstead, I removed the plastic rock guard on the underside of the car, and slipped the shroud out through the bottom. hvac home unitThere are a few wire-guides and connectors on your right that need to be removed before the shroud will clear the car. ac unit turns on but no cold air

I didn't even need to jack the car up.Once the shroud (and fan) were out of the car, I switched the motor with the new one. Do NOT forget to also move the tiny washer from the old motor to the new one, which tends to stick to the old motor shaft and fits so tightly it almost looks like part of the shaft itself. I made this mistake and it nearly ruined my day. Without the washer in place, tightening the nut will cause the metal hub of the fan to be pushed in a bad way so that it is no longer engaged with the shaft. Since there is no other way to grab hold of the shaft, you are left with trying to get the nut back off and no way to stop the shaft from turning. After fiddling with it for a long time, I remembered my dad recommended the use of a pneumatic impact wrench in situations where a nut must be removed from a free-turning shaft. The idea is that the impact wrench hits the nut so hard and so fast, it is able to back it off while the inertia of the shaft holds the part still. Lo and behold, it zipped the nut right off.

The rest of the job was pretty straight-forward, and now my air conditioner works like a champ and doesn't stall the engine.The old motor appears to have died of old age. There aren't any catastrophic problems, but the brushes and commutator show heavy wear. The motor case was full of carbon dust from the brushes. On the side of the unit At the top of the unit in the cool air exhaust port Behind the front grill on the frame Upper right hand corner of weather barrier with grill removed Below the control panel with grill removed Sample Model Number Tag The model number will most likely appear on either a paper sticker or a metal plate. Model numbers can be made up of numbers, letters, or a combination of both such as "1005400" or "LAT100AAE". They may also include the brand name or a year of production such as "16400 3900001-3999999 – 1993" or "2150LE-PREDATOR TYPE 1". We Have 60 Models. Need help finding yourAC - Air Handler Unit |

Repair or Replace Fan - BlowerAC Company in Arizona, Phoenix, Tempe, Glendale, Scottsdale, Mesa, Chandler, AZ What is an Air Handler and how does it work? An air handler is a unit located in your home or building that has a blower fan, heating and/or cooling parts, filters, and dampers. the unit controls how much air is sent out through the air conditioner or heater. It also determines whether or not the air sent is warm or cool air. Small air handlers for local use are called terminal units, and may only include an air filter, coil, and blower; these simple terminal units are called blower coils or fan coil units.  The air handler connects to the ducts that distribute the conditioned air through the home or building and return it to the air handler through the return vent and air filter. What are some signs of trouble with an AC Air Handler Unit in Arizona? The fan unit that works in conjunction with the air handler is the fan that actually blows the air throughout the home or building.

These fans work hard in Arizona and if your unit starts making strange noises or fails to blow at all, the main air conditioning fan may need to be replaced. One of the most common air handler problems in Arizona is condensate pan leaks. AC units in the Phoenix area work hard during the summer and create a lot of condensation that will accumulate in the pan below the air handler. When algae builds up in the lines it can clog the drain line causing the pan to overflow and potentially cause water damage. In some cases, bugs or mice have enter the drain line from the outside of the house and clogged the line. If you ever see moisture or water pooling below your air handler... a condensation leak is usually the cause. The filters in your home’s air handling unit protect its blower assembly. The typical air conditioning system circulates air through a "squirrel cage" blower fan into your home’s duct work. It is very important for you to check and change air filters at least monthly when the system is in use.

The blades of a squirrel-cage fan are cupped in order to cause the spinning cage to move air. Dirt accumulation on the blades fills in this concave area, ultimately changing the "cup" to a simple flat area. The fan will spin just fine, but the air flow will be greatly reduced. Sometimes, the cubic feet-per-minute of air conditioning airflow can literally double when a very dirty fan of this type is cleaned or replaced. Contaminated blower compartments carry a risk to indoor air quality as well as health issues in buildings. Leaks into the blower compartment of an HVAC air handler invite mold problems too. Mice in HVAC systems are also a potential viral or bacterial hazard as well. These conditions suggest that there have not been regular inspections of the equipment. What do I do if there is a problem with my home’s Air Handler Unit? Many people confuse the air handler with the condenser unit outside. The outside unit’s fan only helps cool the coils assisting the condenser.