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Why Won’t My Furnace Stay Lit?

The last thing that you would want to experience is firing up your furnace on a cold winter day and getting nothing. There are different components in your furnace which need to work properly for the unit to stay lit. So if it does not turn on, chances are there may be one or more malfunctioning parts inside the system. Here are some factors that may require diagnosis:

Bad Thermocouple. A thermocouple controls the gas valve that provides fuel to keep the flame burning and acts as a heat sensor at the same time. When the pilot light goes out, the thermocouple closes the gas valve to prevent the gas from leaking into your home. A malfunctioning thermocouple closes the gas valve even when the pilot is on, causing restriction and preventing the pilot light to stay lit. The heat sensor may become dirty also after some time and this dirt can affect the operation of your furnace.

Burner Malfunction. The source of heat in your furnace is the burner and if it fails, there is no way to generate heat. A failing burner happens at lesser chance as compared to pilot light issues. This is commonly caused by blockage in the gas line which starves out the burner so ignition will not take place.

Other Possible Reasons:

Airflow restriction. Lack of proper airflow (mostly due to dirty filter) can cause your furnace to overheat. If this happens, the blower constantly runs to cool down the system and automatically reignite once it reaches the set temperature. If this continues however, the high limit control may fail and will not allow the furnace to reset. This time you may need a licensed professional to do the job.

Pressure Switch. The pressure switch contains a tube coming off the draft inducer. This tube is usually blocked by spiders’ nests and other debris which cause the pressure switch to malfunction.

Bad circuit board. If the problem lies in the circuit board, you need to call a licensed technician for help. Circuit boards have LED codes that provide indications of what is causing the problem. This is a more complicated issue and should not be done independently by homeowners with less knowledge and skill about the matter.

If you need an emergency furnace repair in Granbury, TX or in nearby areas, do not hesitate to call the experts at Texas Made Air Conditioning and Heating.


5 Signs That You Need Your Air Ducts Cleaned

When was the last time you had your air ducts cleaned? If you are not really sure if it’s the right time to schedule an air duct cleaning, here are the signs that you need to consider.

  1. Mold Growth

The presence of mold is an indication of  dirty air ducts. Molds are dangerous particles that trigger asthma, allergy and breathing difficulties to members of the family. Excess moisture in the air ducts causes the appearance of mold on the vent covers. If this happens, schedule a professional duct cleaning right away to sanitize the affected area.

  1. Excessive Debris

Dust, dirt and other debris can gather in the air ducts over time and may restrict the air flow. If you happen to see these particles being forced out of your vents when you start to run the system, you may need to have your air ducts cleaned right away. If cleaning is delayed, the dirt and other debris can block air flow and bring stress on your heating and cooling system.

  1. Clogged Air Filter

The air filter is one of the major components of your HVAC system that needs to be maintained at a regular rate. If the air filter is filled with dirt and dusts, it prevents proper air flow and may bring negative effects on the unit. Also, a clogged air filter prevents air from passing through, causing dirt and debris to gather in the air duct.

  1. Pest Infestation

Are you having issues with insects and rodents recently? These pests find your air ducts a nice place to stay and sometimes find their way into your ventilation system. They might be leaving waste particles and other virus and bacteria which can spread in your home. Have your air ducts cleaned to get rid of dead rodents and insects a well as unwanted particles they may have left behind.

  1. Increased Energy Bill

If you notice an excess hike in your utility bill, this could mean that your heating and cooling system is working harder, consuming more that the right amount of energy for your comfort. Most of the time, the cause is restricted air flow due to dirt build up. Clean both air filters and air ducts to bring back your unit’s proper operation.

If you think now’s the time to have your air ducts cleaned, feel free to call the professionals at Texas Made Air Conditioning and Heating.