Furnace Repair in the Rio Grande Valley, Texas: How to Fix 9 Regular Issues

HVAC man working on a furnace

When your HVAC system won’t work, doing your own furnace repair in the Rio Grande Valley, Texas, can seem overwhelming.

There are a couple of time-saving, low-cost fixes you can do by yourself to prevent a heating service call.

If your heating system doesn’t start, won’t run consistently or won’t ignite, try the troubleshooting checklist below before contacting an HVAC expert.

If you realize you need assistance from a heating and cooling professional and live in the Rio Grande Valley, Cytech Heating & Cooling L.C. is able to help you. We have the ability to repair most makes of furnaces.

CALL NOW 956-630-3522

If you’re ready for a new furnace, we also do furnace installation.

While you’re in touch with our team, think about a regular furnace maintenance plan from Cytech Heating & Cooling L.C. that might help you avoid repairs down the road. A team member can let you know how frequently your furnace ought to be inspected by one of our NATE-certified professionals.

Follow our straightforward guide as shown to start troubleshooting your furnace. The majority of these steps don’t have the requirement of mechanical skills.

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1. Inspect the Thermostat

To begin, make certain that your thermostat is signaling your heat to start.

Digital Thermostat

  • Replace the batteries if the monitor is blank. If the digital screen is mixed up, the thermostat could need to be replaced.
  • Ensure the control is switched to “heat” instead of “off” or “cool.”
  • Make certain the program is showing the appropriate day and time and is set to “run.” If you’re having trouble getting out of the program, adjust the temperature by utilizing the up/down arrows and pressing the “hold” button. This will cause the furnace to ignite if thermostat settings are an issue.
  • Turn the temperature setting to 5 degrees hotter than what the room temperature currently is.

If your heater hasn’t turned on within a few minutes, ensure it has juice by switching the fan switch from “auto” to “on.” If the fan doesn’t operate, your heater might not have power.

Smart Thermostat

If you utilize a smart thermostat—for example one made by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting will depend on your model. Take a look at the manufacturer’s website for assistance. If you still can’t get your Wi-Fi thermostat to function, calll us at 956-630-3522 for heating and cooling service.

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2. Check Breakers and Switches

Next, you ought to confirm your breaker and furnace switch are on.

  • Look for your residence’s main electrical panel. If you have no idea where it is, keep an eye out for a gray metal box in your basement, garage or closet.
  • Ensure your hands and feet are dry prior to using the panel or breakers.
  • Find the breaker titled “furnace” or “heat,” and double-check it’s moved to “on.” If the breaker has tripped, it will be in the middle or “off” spot.
  • Using one hand, steadily switch the breaker to the “on” position. If the breaker trips right away and pops back to “off,” don’t try to reset it and contact a team member from Cytech Heating & Cooling L.C. at 956-630-3522 quickly.

It doesn’t matter how old your furnace is or what brand it is, it has at minimum one ordinary wall switch set on or by it.

  • Make certain the control is moved up in the “on” spot. If it was switched off, expect your furnace to take up to five minutes to ignite. (If you’re unsure where to find your furnace, look in your basement, garage or utility closet. It may also be in a crawl space or attic.)
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3. Replace the Air Filter

When we consider furnace issues, a dirty, clogged air filter is regularly the top offender.

If your filter is too dirty:

  • Your heater won’t keep heating your home, or it may get too warm from limited airflow.
  • Your energy bills might increase because your heater is turning on more than it should.
  • Your heat may break down sooner than it should because a dirty filter forces it to overwork.
  • Your furnace may lose power if an overly clogged filter causes the breaker to trip.

While it depends on what make of heater you own, your air filter can be found within the blower compartment of your heating system, an attached filter case or wall-mounted return air grille.

To swap out your filter:

  • Cut the power to your heater.
  • Remove the filter and tilt it toward the light. If you can’t notice light through it, use a new one.
  • Put in the new filter with the arrow pointing toward the heater to prevent damage.

Flat filters ought to be replaced monthly, while pleated filters should be used for around three months. You can also buy a washable filter that will work for about 10 years. If you have children or pets, you may have to replace your filter more often.

To make the process easier down the line, write with a permanent writing tool on your heater outside or ductwork to list the airflow direction and filter size.

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4. Examine the Condensate Pan

Otherwise known as drain pans, condensate pans catch liquid your heating system removes from the air.

If water is seeping out of your furnace or its pan has too much water in it, use these steps.

  • If your pan has a drain (look for a PVC pipe), double-check that it isn’t full. If it requires draining, use a special pan-cleaning tablet you can get at home improvement or hardware shops.
  • If your pan contains a pump, inspect the float switch. If the button is stuck “up” with liquid in the pan, contact us at 956-630-3522, because you will probably have to buy a new pump.
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5. Watch for Heating Error Codes

If failures continue, take a look at your heating system’s plastic window to confirm the blower motor’s status. Dependent on the model, the light could also be fixed on the outside of your heating system.

If you see anything else besides an uninterrupted, colored light or blinking green light, contact us at 956-630-3522 for HVAC service. Your heating system may be communicating an error code that needs pro assistance.

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6. Scrub the Flame Sensor

If your heating system tries to run but shuts off without distributing warm air, a dusty flame sensor might be to blame. When this takes place, your furnace will try to start three times before a safety device shuts it down for about an hour.

If you feel confident with opening up your heating system, cleaning your flame sensor is a task you can do personally. Or, one of our heating service professionals has the ability to complete it for you.

If you want to clean the sensor yourself, you require:

  • A 1/4” hex screwdriver or wrench
  • Piece of light grit sandpaper, steel wool or emery cloth
  • A fresh paper towel


  • Shut off the heater’s power by using its wall switch or breaker. If you don’t have an electric gas valve, you must shut off the gas along with it.
  • Remove the heating system’s front panel and track the wire to the flame sensor.
  • Take off the rod and use your sandpaper, steel wool or emery cloth to lightly scrub the metal rod.
  • Wipe off the rod with a paper towel.
  • Remount the sensor.
  • Put the furnace doors back on.
  • Restore power to the furnace. It may run through a series of checks before resuming usual heating. If your heater doesn’t turn on, the sensor might require replacement or something else might be wrong. If this occurs, call us at 956-630-3522 for heating and cooling repair help.
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7. Relight the Pilot Light

If you are using an aging heater, the pilot light could be out. To reignite it, locate the instructions on a sheet on your furnace, or use these guidelines.

  • Look for the toggle on the bottom of your furnace marked “pilot,” “on” and “off.”
  • Turn the switch to the “off” position.
  • Take a break for at least five minutes to limit the possibility for creating a fire.
  • Move the dial to “pilot.”
  • Press the “reset” lever as you push the flame of a long lighter to the pilot light opening.
  • Let go of the “reset” switch once the pilot light is burning.
  • If you have used the list twice and the pilot light still won’t ignite or keep lit, call us at 956-630-3522 for furnace service.

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Inspect Your Gas Delivery System

Try switching on a second gas appliance. If it doesn’t work, your natural gas service could be turned off, or you might have run out of propane.

We Can Provide HVAC Repair

Went through our troubleshooting list but your furnace still doesn’t run?

Reach us today at 956-630-3522 or contact us online. We’ll visit your house and pinpoint the trouble.


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