testing AC in winter? Find an InterNACHI certified Indiana Re: testing AC in winter? "working together to get-IR-done" Chris Walsh David A. Andersen & Associates Clarksville - Nashville Home Inspector Lic#40 ITC Level III Thermographer Cert#1958 Building Science Thermographer Cert#33784 HVAC Certification EPA Cert#2046620 Never and most HVAC techs won't do it either. Providing home inspections in Greensboro, High Point, Burlington and the surrounding areas. Home inspections in Raleigh, Durham, Cary, Chapel Hill, Apex and surrounding areas. Providing home inspections in Greensboro, Raleigh, Winston Salem. Originally Posted by dandersen LOL i do have that one, mine was good international actually . i have had it in 1996 i think, ill have to find it Home Inspection Reports Powered by: Originally Posted by eholliday It is not that you can�t run them it is more that you are operating them outside the normal design parameters.

Typically (if you use your head) there is no need for air conditioning if outdoor ambient is below 70. (78 by my personal comfort zone not taking into account Relative Humidity) and I personally won�t evaluate them as a Home Inspector below 75 F outdoor and a minimum of 75 F indoor because you need the indoor heat loads, the main reason we all have air conditioning.slider window ac unit Many air conditioners are equipped with factory installed low ambient controls to prevent operation in low temperatures while with others it is an advisable option.does spraying your ac unit with water help So if the a/c doesn�t start are you going to determine that the low ambient control is stopping it or are you going to bypass this control to determine if the a/c is operating satisfactory? lg room ac units

Or are you going to assume that it is not responding to the thermostat and recommend further evaluation? Or are you going to say it is operating ok based on what,,,delta T? Yes air conditioners do run at temperatures below 60 with the proper accessories and depending on humidity they will utilize an economizer section for �free� cool air or the use of a head pressure controls to maintain reasonable operating pressures. You are correct, the manufacturer does not say NOT to run below 60 BUT the references and tables given by the manufacturers to trouble shoot and diagnose is typically limited to a temperature range of 60 degrees F to 115 degrees F. Any adjustment of refrigerant outside this range is not recommended. Furthermore manufacturers recommend that operation below 60 F only with the use of appropriate accessories. Now given that, even if you have a heat pump (which does run in low ambient) that requires a refrigerant adjustment, a tech may ESTIMATE an adjustment of the refrigerant charge based on temperatures, pressures, installation and operating characteristics of that particular unit BUT the corrected charge should be re evaluated under normal air conditioning operating conditions typically 85 to 115 outdoor air.

If you need residential air conditioning temperatures below 60 it�s called a walk in cooler, refrigerator or freezer. If you have an indoor load that requires air conditioning in a home when outdoor conditions are 60 or less open a window. Note temperature ranges on tables below. I don;t think the tables stuck to this. An HVAC tech. told me that that the oil in the condensing unit cannot circulate properly when the outside temp is below 60 degrees. Richard W. Washington, owner RW Home Inspections, Inc. Texas Real Estate Commission (TREC) Professional Inspector License #7238 Texas Professional Real Estate Inspectors Member (TPREIA)-Greater Houston Chapter InterNACHI member since 2004 Based in Katy, serving Houston and all surrounding communities Originally Posted by rwashington that is what i have heard that the compressor may overheat becuase of the oil is not circulating or not there. House 2 Home LLC Protecting Peace of Mind One House at a Time

A favorite place on Google MapsSpoiler alert: That’s not supposed to happen Even the quietest modern air conditioners make some noise as they cool your home, but there are some sounds your AC just shouldn’t be making. Clicking, banging, clanking and hissing sounds are signs of trouble, and if you hear them, you’ll need to take action to identify and resolve the problem. Here are some common indicators of AC maintenance issues. First, listen for vibration noises. A humming sound generally isn’t an indicator of a serious issue, but it probably means that something inside your air conditioner is slightly out of order. Loose parts and too-tight refrigerant piping can cause vibration, and if left unchecked, lead to a more serious maintenance issue. Buzzing or humming could also be a sign of an electrical problem with your air conditioner. Shut off the power and check around the wires for any signs of corrosion, rust or other damage. If the compressor hums and refuses to start, there may be an issue with the motor.

Either way, your air conditioner needs professional service. Like vibration, rattling is usually a sign of a fairly simple maintenance issue. It might just mean that the screws or bolts that hold the casing in place have come loose. After shutting down your air conditioner, try tightening those screws and see if that fixes the problem. If not, it’s important to have your system inspected by a professional. If your air conditioner hisses during normal operation, that could be a sign of a leak in the duct system. Left unchecked, that leak could cost you quite a lot in lost cooling power. More seriously, hissing could be a sign of a refrigerant leak, which needs to be professionally repaired immediately. An AC service professional will be able to check the refrigerant gauge to see whether it’s still in the recommended range. Clicking, clanking and banging sounds are all indicators of serious issues. A loose connecting rod or crankshaft, for instance, might be making the noise.