Top 4 HVAC Repair Myths

  1. A technician said my coil is rusty therefore I must have a leak. Although likely to be true, it is not 100% accurate. The coil rusts when too much water or ice builds up on the coil over time. Ice can build up on the coil for other reasons, not just for leaks. Air flow has just as much impact on creating a frozen coil situation. Crushed ducts, poor design or dirty air York Air Conditionerfilters can all prevent enough warm air from flowing across the coil to prevent it from freezing. Proper maintenance and routine filter changes can help prevent frozen coils.
  2. My Capacitor is not swollen so it must be good. Not necessarily. A capacitor can be weak but not dead. A weak capacitor can wreak more havoc than a dead capacitor. Usually a dead capacitor will prevent the motor from running. Whereas a weak capacitor will allow the motor to run under poor conditions and quickly shorten the life of the motor. Motor replacements are expensive.
  3. A technician said a UV light would prevent dirt in my ducts. While a UV light helps prevent bacteria from growing on your coil, it does not prevent or destroy dust particles. Those pass the light unaffected and build up on motors and insulation that allows mold growth.
  4. I don’t need to maintain my heating or air conditioning system until it stops working. Although this is the choice most homeowners make, it is incorrect to assume the system will run fine without maintenance. Hidden dangers build up every year that a system goes without maintenance. Capacitors start to go weak (see item #2), compressors start to run hotter, drain lies build up with mildew. Delaying the maintenance will likely force the homeowner to spend more money on major repairs sooner than would be normal for a well maintained system. Maintenance does not guaranty your system will not need any repairs, but it does improve the life span of one of the most expensive systems in your home. You change the oil in your car every 3000 miles, why wouldn’t you have your system cleaned and inspected every year too.

ALEXANDER HEATING AND AIR CONDITIONING

919-886-4822

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4 thoughts on “Top 4 HVAC Repair Myths”

  1. My Lennox dealer/tech came to check my ac and he was here five minutes and told me that my air handler motor was gone. Need a new one. I asked if he had checked the capacitor as I read your post and he said my Lennox ac does not have a capacitor. A/c is only 4 years old.So I called office and secretary said they are sending another tech to check again, blah, blah. What do you think? Am I being scammed.

  2. My central & air unit is running the fan comes on but i have to turn it by hand to start then when it goes off it makes a loud hissing sound dont know what peoblem is

    1. Sounds like a capacitor may be the problem to the fan. But you may also have bearings in the fan motor going bad. The hissing noise is only telling me that you have a heat pump and the reversing valve is disengaging as it turns off. This is normal for a heat pump.

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