Your Heating & Air Conditioning Contractor How Comfortable Do You Want To Be? You Have Problems, We Have Answers Commonly Reported HVAC Problems: Copyright © 1997 Hannabery HVAC. Outdoor unit won't shut off unless I use the circuit breaker:The thermostat reaches the desired temperature, the indoor unit shuts off, the air stops blowing, but the outdoor unit keeps on running. In the heating mode (if it's a heat pump) it could eventually shut off on a high pressure safety device. But in the cooling mode, it could run forever unless you turn the breaker off. And this will cause the indoor coil to freeze up into a solid block of ice, eventually the ice will build-up and travel all the way to the outdoor unit. So what causes this? Only a few things, the most common of which is a stuck compressor contactor - located in the outdoor unit. The contacts tend to get pitted-up. Eventually they can weld shut. This can cause serious damage to the system. It is good practice to replace the contactor every few years or when pitted - just like spark plugs in a car.

Another cause would be a shorted thermostat cable. This can be caused by a weed-whacker hitting the wire outside, or a wire-staple digging into the wire too tightly, rodents chewing on it, or just bad wire. Lastly, the thermostat itself could be bad, sending a signal to the outdoor unit when it isn't supposed to. Below is a list of possible causes. Items in red usually require a service call. Items in blue however can be addressed, some even fixed by the homeowner. Red = Professional fix | Blue = Homeowner fix Please keep in mind that the information found on our website is provided free of charge and Hannabery HVAC does not assume any liability resulting from the information we provide. We hope this information helps, but please note that these are just rough guidelines, and not all possible situations are covered. Your HVAC system should be inspected and repaired by a trained technician. Call us at 1-800-544-4328 [Must be in our service area] We look forward to having the opportunity to serve you.

If you have any questions or comments, please do not hesitate to contact us. OUR CREDENTIALS AND AFFILIATIONS...It only happens occasionally. indoor blower goes off; outdoor unit continues to run and can only be turned off with circuit breaker. Only 2 or 3 things can cause this. The most common is a stuck compressor contactor. Located in the outside unit, the contacts get pitted and eventually weld shut. This can cause serious damage. Some authorities think it is good practice to replace the contactor every few years just like you would replace the spark plugs in an automobile. Other causes would be a shorted thermostat cable or a defective thermostat. Below is a list of possible causes and usually require a service technician to correct. Hope this has been of some assistance, however they are just rough guidelines and not all possible conditions are covered. The company You Choose To Install and Service Your System Will Determine The Degree of Comfort and Satisfaction You Enjoy.

Excerpts of the preceding information have been compiled by Hannabery HVAC, which has graciously permitted us to include them on this web site as a service for all homeowners. " are provided FREE and as a consequence Climatemakers does not assume any liability resulting from any information we provide. In all cases where there is any possibility of injury, consequential damage, direct damage to your equipment or when recommended by the equipment manufacturer, your system should be repaired, inspected or maintained by a qualified technician.best hvac units residentialHave a constructive comment? electric motor for ac unit If you find an error on this page I would appreciate it if you would email us or call 757 468-5800.samsung window air conditioner instructions

Since their development in 1902, modern air conditioning units are efficient and relatively trouble-free. Like other major appliances, the equipment can experience mechanical or electrical problems. This guide provides an overview of some of the most common problems that can occur with a central HVAC system. Northwest Indiana homeowners can troubleshoot their systems to identify potential reasons for performance issues. While homeowners can resolve some of these problems, others require the assistance of an experienced heating and air conditioning specialist. An air conditioning system may fail to operate at the beginning of the cooling season. The unit will not come on if the thermostat is defective or set improperly. Another potential issue may be that your unit is not receiving electrical power. Verify that your thermostat selector is set in the “cooling” position. Some systems have a built-in timer that delays the activation of the equipment. Wait several minutes for the timer to complete its cycle, and adjust the thermostat several degrees below the temperature inside your home.

If the thermostat requires calibration, contact a service professional. You should also verify that the appliance is receiving power. Locate your main fuse panel, and determine whether the fuse or circuit breaker for the equipment has blown or tripped. Replace a blown fuse with one that has the same amperage, or reset the circuit breaker. Some units have a breaker panel located near the outside unit. Verify that the breaker inside this electrical box is on or the quick disconnect is inserted properly. If the system continues to have electrical problems, you need the assistance of an experienced repair technician. One possible reason that HVAC systems blow warm air is dirty filters. The system is producing cold air but it cannot flow through the ductwork. Clean air filters protect your equipment and help it perform properly. HVAC systems work harder as the outside ambient temperatures approach triple digits and may not cool as effectively as you desire. You should also verify that the outside unit is running.

If the outdoor unit is on, ensure that leaves and other debris are not obstructing the airflow. An air conditioner that blows warm air can be a sign of insufficient refrigerant. Only licensed air conditioning repair technicians can replenish HVAC coolant. An improperly sized air conditioner will cycle on and off frequently if it is too large for your home. The system will quickly reach the setting on your thermostat and signal the equipment to cycle off. When the temperature drops below the setting on the thermostat, the unit will come on again. Rapid cycling can also occur when an air register is blowing cool air directly on the thermostat. Several issues can cause a unit to runs continuously. The equipment could be too small to cool the volume of air contained in your home. Another potential problem is that the inside unit turns off but the outside fan continues to run. Turn the thermostat fan switch to the “Off” position. If the fan is still running, you should stop power from flowing to the system.

To perform this task, it may be necessary to turn off the circuit breaker supplying the equipment. Low refrigerant levels and faulty relay switches can cause a HVAC to run continually. An experienced HVAC technician can correct these problems. The inside component of an AC system sits inside of a drip pan, which is designed to collect water if the unit’s condensation drain line becomes clogged. This problem can occur when insects build their nest inside the drain line. If water is visible in the pan, you can blow compressed air inside the pipe to remove the obstruction. Prepare a solution that consists of a 50-50 ratio of bleach and water, and pour it into the drainpipe to eliminate mold and mildew. Clearing the clogged drain line may require the assistance of an air conditioning repair technician. Various problems can cause an AC unit to freeze. One possible reason is improper airflow, which can prevent a HVAC system from working properly. Check your filters and clean or replace them as required.

The coils should be free from dirt, debris and other obstructions as well. HVAC systems can freeze if the blower fan is malfunctioning. The cold air will remain inside the unit and freeze the coil if the fan is not working. A faulty control relay can also cause the unit to freeze. The outside unit will continue to run even though the inside unit is off. While a homeowner can clear away debris and change the air filters, replacing electrical components requires the expertise of a certified technician. According to heating and cooling industry studies, regular air conditioning unit maintenance checkups can prevent most HVAC performance issues. Our friendly and knowledgeable Meyer’s technicians can perform seasonal tune-ups on your system. Routine care and maintenance prevents common HVAC problems from becoming major repair expenses. Our team can identify and correct issues that prevent your equipment from performing as designed. Contact our office to schedule a service call with one of our knowledgeable technicians.