• Your Comfort is Our Business
  • Contact Us @ 1-800-540-1440
  • Serving Central NY, Capital Region, Southern Tier,
    Hudson Valley, Rochester & Buffalo Area
  • HVAC System FAQs

    With proper maintenance, an HVAC system from Holbrook Heating and Air Conditioning should last you many years. Here are answers to some of the most common questions we get about our units.


    1) My furnace comes on and off a lot. Is this normal?
    Yes. You’ll often find that newer systems turn on and off more frequently than older systems, and if we’ve just installed a new furnace for you, you probably have nothing to worry about. Fortunately, this does not mean that you’re using more energy. Modern appliances are designed to be more energy efficient. However, if this is a change from the way your furnace has behaved in the past, it may need a cleaning and tune-up.

    2) Where is my air filter and how do I change it?
    The air filter is typically located near the spot where the HVAC system takes in air from the home. This varies based on the model. Changing it is usually as simple as popping it out and inserting a new one. Occasionally, there is a release button or a screw holding the filter in place. If you’re not sure where to find the filter or how to replace it, check the user manual or have one of our technicians show you when we’re there for maintenance.

    3) How do I operate my thermostat?
    Most modern thermostats have simple on/off switches and buttons marked by arrows to increase or decrease the temperature. However, many new thermostats are also programmable, allowing you to set the temperature you want for different times of day. You can always override the program you set. Please consult the manual for details on how to do this.

    4) I have an error code. What does it mean?
    An error code means that your HVAC system is having a problem. You can often find the exact meaning of the code in your user manual. In most cases, it is a simple fix. However, it’s important to have a qualified HVAC technician make any adjustments or repairs. Attempting repairs on your own can be dangerous and may void your warranty.

    5) How do I reset my unit?
    If the unit won’t turn on, resetting it may help. First, you should check the circuit breaker associated with the unit to be sure that it hasn’t been tripped. If it is, reset the breaker. If the circuit breaker wasn’t tripped, unplug the unit for at least 12 seconds and plug it back in. Look for your reset button and press it. The exact location of the reset button varies by brand, but it’s often a small, red button. Check the user’s manual if you are unable to find it.


    1) The fan is on, but it’s not blowing cold air. What’s going on?
    The simplest thing to check is whether you’ve set the machine to “auto” or “on.” When it’s set to “on,” the fan will turn at all times, but cold air will come only when needed to maintain your desired temperature. If you set it to “auto,” the fan will only turn on when cooling. Air conditioning units may also be running but not blowing cold air when the filter is dirty or the outside fan is covered with dirt. Clean these to see if it makes a difference. Otherwise, call an HVAC professional for repairs.

    2) Is it normal to have ice on my unit?
    It’s not uncommon to have ice on your unit, but it’s a sign of a problem. Ice forms when the air flow is compromised in some way. If you find ice, unplug the unit and allow the ice to thaw. While waiting, check the areas where air flows, such as the fan on the outside of the home, and the intake vent inside the home. These should be clean, and there should be nothing blocking the flow of air. Turn the unit on, but if ice forms again, give us a call.

    3) Should I cover my A/C during winter?
    Most units do not require covers, but in areas with heavy snowfall like ours, you may want to cover the top of the unit so extensive snow and water doesn’t get into it. A full cover, however, could act as a shelter for small animals, who can damage your HVAC system. Your technician should tell you the exact recommendations for your particular unit.

    4) Why isn’t the A/C cooling to the temperature set on the thermostat?
    There are a variety of reasons for this. On a really hot day, your system may simply not be able to cool your home down as low as you want it to go, particularly if you’re not combining A/C use with other cooling techniques like ceiling fans and curtains on the windows. This problem also occurs when the A/C unit is not big enough for the home. It can also happen with the air filter or other components are dirty. If this is a consistent problem – even on days that are not part of an unusual heat wave – call a technician to check that everything is working properly.

    5) Why is water in a certain area?
    When the A/C runs, water from the air in the home condenses from the cold. This water typically trips into the condensing pan, then runs through a tube for proper disposal outside. If the water you’re seeing is unusual, there may be a clog in the tube. That should be repaired for proper functioning.

    At Holbrook Heating and Air Conditioning, we take pride in providing excellent customer service. If you’re experiencing any problems with your HVAC system, please contact us to schedule an appointment with one of our HVAC technicians.