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HVAC Services in San Jose, CA

Heating and Air Design offers a wide range of heating and cooling services including product installation, repairs and maintenance. Our factory trained technicians can repair and service any make and model of heating and cooling equipment. We offer high efficiency ductless systems so you know you are getting a quality brand system installed in your home. We also offer HVAC accessories such as indoor air quality systems and temperature controls.

We are licensed, bonded and insured so you know you are getting a reputable heating and cooling contractor when you call. Whatever your heating and cooling needs, whether it is a system installation, an ac repair or furnace repair, or service maintenance, we are the right dealer to take care of your needs. Please call us today at 209-594-1997!

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Troubleshooting Your System

Symptom Problem
Doesn't operate immediately:
  • If the unit is stopped and then immediately started again, the compressor will not operate for about 3 minutes, in order to prevent fuse blowouts.
  • Whenever power is interrupted, the protection circuit will prevent the unit from re-start for 3 minutes when power returns.
Noise is heard:
  • During operation and immediately after stopping the unit, the sound of water flowing in the air conditioner's piping may be heard. Also, noise may be particularly noticeable for about 2-3 minutes after starting operation (sound of coolant flowing).
  • During operation, a slight squeaking sound may be heard. This is the result of minute expansion and contraction of the front cover due to temperature changes.
  • Some smells may be emitted from the indoor unit. This smell is the result of room smells (furniture, tobacco, etc.) which have been taken into the a/c.
Mist or steam is emitted:
  • During Cooling or Dry operation, a thin mist may be seen emitted from the indoor unit. This results from the sudden cooling of room air by the air emitted from the a/c, resulting in condensation and misting.
  • During Heating operation, the outdoor unit's fan may stop, and steam may be seen rising from the unit. This is due to Automatic Defrosting operation.
Airflow is weak or stops:
  • When Heating operation is started, fan speed is temporarily very low, to allow internal parts to warm up.
  • During Heating operation, if the room temperature rises above the thermostat setting, the outdoor unit will stop, and the indoor unit will operate at very low fan speed. If you wish to warm the room further, set the thermostat for a higher setting.
  • During Heating operation, the unit will temporarily stop operating (between 7 and 15 minutes) as the Automatic Defrosting mode operates. During Automatic Defrosting operation, the OPERATION indicator lamp will flash.
  • The fan may operate at very low speed during Dry operation or when the unit is monitoring the room's temperature.
  • During SUPER QUIET operation, the fan will operate at very low speed.
  • In the monitor AUTO operation, the fan will operate at very low speed.
Water is produced from the outdoor unit:
  • During Heating operation, water may be produced from the outdoor unit due to Automatic Defrosting operation.
Symptom Items to Check
Doesn't operate at all:
  • Has there been a power failure?
  • Has a fuse blown out, or a circuit breaker been tripped?
  • Is the timer operating?
Poor cooling or heating performance:
  • Is the air filter dirty?
  • Is the air conditioner's intake grille or outlet port blocked?
  • Did you adjust the room temperature settings (thermostat) correctly?
  • Is there a window or door open?
  • In the case of Cooling operation, is a window allowing bright sunlight to enter?
  • In the case of Cooling operation, are there heating apparatus and computers inside the room, or are there too many people in the room?
  • Is the unit set for SUPER QUIET operation?
The unit operates differently from the Remote Control Unit's setting:
  • Are the Remote Control Unit's batteries dead?
  • Are the Remote Control Unit's batteries loaded properly?

Maintenance Tips

Caring for your Fujitsu air conditioning unit will surely prolong its life. There are steps that you can take to help minimize any problems in the future.

6 Steps to Prepare Your A/C System for the Summer

  1. Clean Primary Filters It’s important to keep the primary filters clean.
    Consider the environment they're in, the presence of airborne dust and debris and hours of operation. Some indoor units will require only annual cleaning of the easily-removed mesh filters. In warehouse or laundry areas, it may be important to clean them monthly.

  2. Clean Secondary Filters Some manufacturers offer sophisticated indoor air quality filtration.
    Most are easily removed and cleaned. The Fujitsu system is programmed to alert an occupant or building owner of the need to clean the IAQ filter after 400 hours of operation.

  3. Clean Indoor Unit Coils Check to be sure that the evaporator coils are clean.
    Though indoor air handler coils are amply protected by the various levels of filtration, it’s good to examine coil cleanliness each year. Coils usually require cleaning on a bi-annual basis.

    Typically, evaporator coil cleaning entails:

    a) Remove front cover of the unit in question, visually inspect evaporator coil. If needed, vacuum the evaporator coil with a soft bristle brush attachment removing all dust and debris. Chemicals can be used but should be diluted with water so that it will not damage the metals as well as the surroundings of where the unit is installed. NOTE: If chemicals and water are needed to clean, please SHUT OFF MAIN POWER to the equipment.

    b) Next step is to be sure drain pan is free of any mold, mildew and or algae that would cause any unpleasant odor or clogging, again using household bleach and diluting with water would be sufficient enough to remove any grime mentioned. Also check to make sure that the flexible or rigid drain hose is also free of all clogs as well.

    c) Lastly, be sure that all equipment is dry of any water before re-assembling and turning power back on.

  4. Balance Fan Wheel and Blower Assembly: Are the fan wheel and blower assembly in balance?
    It's very uncommon for this to be a problem, but units can be challenged by heavy accumulations of airborne grime and debris, such as in fast food kitchen locations, or in feed mill operations.

  5. Miscellaneous Checks: Is the condensing unit in top shape?
    Check refrigerant lines for apparent bumps or dents. Are the insulation wraps in good shape, or have they deteriorated from exposure to UV radiation? Is the unit mounted solidly on its base? Has the base moved, or is it slipping for any reason?

  6. Clean Outdoor Unit and the Surrounding Area.
    Make sure that the outdoor condensing unit’s horizontal discharge is free of debris. These systems rarely attract debris, but if grass clippings are thrown into them from nearby mowing, or if an abundance of wet leaves collect around the unit, these should be removed. If cleaning is required:

    a) Shut off electrical power to the entire system; you can shut off main breaker in main panel or shut off power at the main outdoor disconnect located near the outdoor unit.

    b) Next important job is cleaning the condenser coil; a fan that basically sucks outside air through the fins, leaving them covered with lawn clippings, dirt, bugs, dead leaves and other debris. This fun little job may need to be done every couple of weeks during the spring and summer when pollen and dandelion "wishies" are flying around freely in the air! Use a garden hose and a soft nylon brush to clean the condenser coil fins. Chemicals can be used please refer to indoor unit coil cleaning.

    c) Two copper tubes that should be wrapped separately from one another connect the compressor and the condenser coil to the evaporator coil back inside the house. Visually inspect the insulation for signs of wear or damage. If need be replace insulation on copper tubing if worn or dried out and disintegrated.

    d) If you see any signs of refrigerant or oil leaking inside or around the compressor or condenser, it's time to give your A/C pro a call.