Troubleshooting Your HVAC This Spring

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May 6, 2022

In the spring, many people shift from heating to cooling. More often than not, this process goes as planned and your home's comfort is maintained as days get longer and warmer. However, there are times when you may have an unexpected HVAC issue to deal with as you adjust to the warmer temps. Should this be the case, we offer some tips below to troubleshoot your HVAC this spring.

Check Your Furnace (and Take a Few Other Initial Steps)

First, make sure your HVAC system is set to the preferred mode. Next, switch it to AC mode and turn the temperature setting down to see if your furnace kicks in. If it does, then you know your AC is likely the problem. Also, with initial troubleshooting efforts, we recommend:

Resetting the furnace circuit breaker
Checking the outside condenser unit
Make sure your HVAC plug isn't loose

Hose Off the Condenser Coils

The condenser coils are in your outside unit, and they sometimes get dirty enough to affect how your HVAC system operates. This is especially true after the fall and winter seasons. So, continue your troubleshooting efforts by using a garden hose to rinse the coils off. Do this by:

Aiming the nozzle on the hose upward to get rid of any gunk underneath the coils
Working your way around the coils
Pointing the nozzle down to wash dirt and debris off the coil fins
Use a gentler stream to rinse the coils off again to get rid of any debris that may be left

Test the Fuses in the Disconnect Box

The disconnect box is located over by your outside unit. It's the box that covers the connections that go into your home. Inside this box, you should find a pair of cartridge fuses. Test these fuses by:

Starting with the lowest multimeter Ohms setting
Touching the leads to opposite fuse ends
Checking the reading
Looking for a minus symbol that indicates a fuse is bad – otherwise, it's fine

Make a Few Inexpensive Part Replacements

If the fan isn't running when your HVAC is turned on and set to cool, you may need to replace some parts. Start by shutting off the power in the electrical panel. Use a voltage tester to confirm it's off. We're talking about the start/run capacitors, AC contactor, and condenser fan motor.

Before going any further, look for signs of chewed or damaged wires. If you see this type of damage, contact an HVAC specialist. Also, it's best to hold off on replacing the fan motor – or let a professional do this. Instead, we recommend replacing the start/run capacitors and contactors.

Snap a pic of everything first to know exactly how to re-connect things. Remove both of these parts. If you need some help finding the parts, look for a diagram of your outside unit online you can use for reference. Complete the replacement process by:

Using a screwdriver to disconnect the contactor
Using needle-nose pliers to remove the capacitors
Putting the new parts where the old ones were located
Securing both of the parts before putting the access panel back on
Turning your circuit breaker on again
Testing your work by setting the thermostat to see if your AC runs correctly

Call Us Today

Reduce your risk of being surprised by HVAC issues this spring by contacting Master Mechanical. We can do a routine inspection to determine if there are any minor problems we can take care of before they turn into more serious ones. We're also at your service if you need prompt and dependable HVAC assistance during any time of the year.

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Taylor D.

Tom, the owner was awesome. He came out immediately when our furnace went out and completed a challenging fix. When I asked if I should replace the furnace he said no. Honest and did outstanding work. Furnace is quieter and seems to be running better than when we moved in!
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Tom came over and thoroughly discussed my options. We discussed at length the pros and cons of the most expensive and least expensive options, and came up with a fair price for the products I chose. The crew showed up on time and finished the same day, and was easy to deal with. The new furnace heats my house so much better than the old one. I would definitely use Master Mechanical again. And I have. I’ve now replaced multiple furnaces and AC units using Tom and his crew at Master Mechanical, and would use them again.
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Master Mechanical responded quickly when our AC failed following a power surge. They quickly diagnosed the problem, and responded patiently to my uninformed consumer questions. Once the team arrived to complete the repair work, they were professional and again, knowledgeable. Prices were fair, and they followed up with me after work was completed. Overall a great company!
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Did an excellent job on two repairs. The first was an emergency call for a furnace repair when it was 4 degrees F outside. They showed up on time, diagnosed the problem, went for parts, repaired the furnace all in about an hours time. The second repair was for the whole house humidifier attached to the furnace. It was a minor issue and corrected in less than 40 minutes. Everything is working great. My experience with their work is excellent.

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