How to Fix Heating and Air Conditioning?
Sometimes, we wait long hours for HVAC installation and repair service or pay a lot for just a minor issue in our HVAC systems. Issues like changing a filter, resetting a thermostat, or a simple wire check can be easily fixed without the help of an HVAC technician. That’s why, in this blog, we’ll guide you on how to fix basic heating and air conditioning problems yourself without fancy tools or degrees. By the end, you’ll not only save time and money but also feel a little more like a home comfort hero.
1. How to fix power issues?
Check the circuit breaker
A tripped circuit breaker is a common reason your HVAC unit won’t turn on. Using too many appliances at once can trip the circuit breaker. This is also common when there are power surges after a big storm. To reset it, find your electrical panel (usually located in your garage) and check to see if any of the breakers have been tripped. Flip the breaker from on to off and back again. Then check to see if this fixed the issue.
Check the emergency shut-off switch
See if the emergency shut-off switch is on. This is usually located next to the outside AC unit in a metal box hanging on your house. For a furnace, the emergency shut-off switch may be on or near the furnace. It may also be on the ceiling in front of the furnace or simply somewhere in your basement. It usually resembles a standard light switch.
Check the condenser wire
Another possible reason your AC is not working is that your condenser unit has come unplugged. This is especially common with window units. Be on the lookout for a cord coming from your unit that is connected back to a panel on the side of your home. These wires may become unplugged or even chewed by an animal. This will stop the flow of electricity to your unit, which will prevent it from starting up.
Check the drain pan
When your HVAC system runs, it creates condensation that exits your home via a drain line. If the drain pan is full and/or clogged, it will trigger a safety switch, turning off your system. The drain line can be unclogged with a wet/dry vac or pipe snake. Clearing the drain line blockage could easily solve the problem.
If this does not work then check for these:
- Take a look at your home’s fuse box and replace any blown fuses you find.
- Inspect the wiring to see if the power supply is affected.
- If this doesn’t fix the issue, call for an HVAC installation and repair service to see if the wiring is still in place and if the cooling system’s motor is damaged.
2. How to fix thermostat issues?
The thermostat is the brain of your heating and air conditioning unit, and it tells the system what to run and when to run it. Check that your thermostat is in the proper setting for what you need, whether that’s heating or cooling, and the temperature is set at least 5 degrees below the current indoor temperature. If the unit is not working on the desired temperature setting or shows inconsistency, you may have to replace the batteries in the thermostat and make sure the wiring inside is secure and properly connected.
If your thermostat is in an area with a draft or direct sunlight, this can throw off the reading and cause your system to run inconsistently. Move it to an area away from direct sunlight near the center of your home to make sure the temperature reading is accurate.
3. How to fix a clogged or dirty air filter?
Your HVAC system has air filters to catch dust and other debris before it travels throughout your home, and over time it can build up and cause a clog. A dirty air filter reduces the efficiency of your system, but it’s an easy fix. Take a look at your filters and see if there’s a buildup of dust and other contaminants. If it looks full, you can purchase a new filter and install it yourself. Make sure you get the same size of filter and replace it every 1 to 3 months to keep your system running efficiently.
4. How to fix low refrigerant levels?
Your air conditioner uses refrigerant to cool the air before sending it through the vents across your home. If there isn’t enough refrigerant in the system, it can’t get the air as cold as it needs to be. Signs of low refrigerant levels to look out for include lukewarm air from the vents, a hissing sound, and ice buildup in your system.
Refrigerant refill is a delicate process that requires professional help. It can be harmful if you come in direct contact with the material, and one wrong move could break your entire system. If you suspect the problem has to do with the refrigerant, call our professional HVAC installation and repair service and let us handle it.
5. How to fix a frozen evaporator coil?
Ice can build up on the evaporator coil in your air conditioner and prevent proper home cooling. If you notice a buildup of ice, turn off your AC and let it sit. This can take up to 24 hours. Switch the fan to “on” to bring in some warm air, and gently use a hair dryer to melt the ice. Let the coils fully dry before you switch on the system again.
Remember that low refrigerant levels and improper fan operation can also cause this issue. In any case, if you see this is the issue, you need to call our reliable HVAC installation and repair service.
6. How to fix blocked or dirty condenser/compressor coils?
Outdoor HVAC systems can get blocked up with dirt and foliage over time. You can keep your system running smoothly by clearing out any debris you see near your unit and making sure no dirt or leaves have snuck inside the unit.
7. How to fix obstructed airflow?
Poor airflow reduces the efficiency of your system and prevents it from properly heating and cooling your home. Check that your vents and registers are clear of any debris or dust, and make sure the HVAC dampers are adjusted properly. Regular ductwork maintenance can also make sure everything looks good and your ducts are free of any dust or clogs.
If all this doesn’t work, then the blower belt might need replacing, or the condensate pump reservoir may need emptying. This is an easy fix, but we recommend a professional to handle
8. How to fix odd noises coming from an HVAC unit?
Unusual sounds could be a sign of heating or cooling system problems such as cooling issues or AC troubleshooting. Here’s what you should do according to the sound:
- A squealing noise often means the belt is misaligned or needs replacement.
- A grinding noise suggests the motor bearings need lubrication. A technician can address this at the start of the season.
- Rattling or buzzing sounds could be from loose, dusty, or bent fan blades or coil fins. Clean them with a vacuum and secure any loose screws.
- If you hear pinging or popping, it might be a loose metal flap in the ductwork. Tighten any rattling cover panels.
9. How to fix humidity or leak issues?
If your system isn’t managing humidity or is leaking first turn off the power and use a wire to clear the drain channels (for AC). If you see signs of algae buildup use a bleach solution to clean algae from the pump system while the system is off.
If this doesn’t fix the issue also check for leaking pumps that may need replacing (for AC), pump’s electrical connections are intact, oil level, refrigerant pressure, or safety switches.
Reliable HVAC installation and repair by Mr. Good Guy
Call Mr. Good Guy Heating & Air today. With free estimates, 24/7 emergency service, and over 25 years of experience, we are committed to reliable, honest work. Whether you need routine maintenance, a full installation, or fast repairs, our friendly technicians treat your home with care and respect. Our team will listen to your needs, offer honest options that work for your budget, and get your heating or cooling back on track—often in less than 24 hours.