Ask us to qualify for a

No-cost tune-up from ONCOR®!

Valued at up to $200, free for you with the Mondragon Mechanical team!

Spring is coming! Contact us NOW to qualify at
972-214-7002 or filling out the form. We work in ALL Dallas, Metroplex!


Free HVAC tune-up from Oncor and Mondragon Mechanical

Ready to stop losing energy and start maximizing your comfort?


Regular maintenance is essential to ensure effective operation.


Reduces heating maintenance costs and extends the service life of the heating system.


Ensure the optimum performance and longevity of your boiler with a professional boiler maintenance service.


A no-cost HVAC Tune-up from ONCOR ® can help you when autumn comes and temperatures drop.

During your heating calibration, a Mondragon Mechanical technician will inspect your equipment, perform cleaning and lubrication, calibrate thermostats and controls, and replace filters as needed. With this, your furnace will be ready for the coldest days.

The best? You don’t need to pay for it. 

ONCOR® provides this service to our Dallas, Metroplex community so that residents can improve home comfort and save on energy costs. Check with us to qualify* today to start saving money and improve your cooling system.

*Conditions apply. For more information check our FAQ.


An HVAC tune-up is a regular maintenance service performed on a heating, ventilation, and air conditioning (HVAC) system to ensure it is running efficiently and effectively. It involves a thorough inspection of the system’s components, cleaning or replacing of filters, and adjustment of settings to ensure optimal performance. 

Performing a tune-up can help your HVAC system work better, specially in summertime. This will help you to save money. Also, can help identify potential issues before they become major problems, improve energy efficiency, and extend the life of your HVAC system. It’s recommended that homeowners schedule a tune-up at least once a year, typically before the start of the heating or cooling season.

To qualify, your central A/C or heat pump must be a working unit that is under five tons, at least 1 year old and has not received a CoolSaver® tune-up within the last five years. The cooling unit must service an income eligible ONCOR® property. Outdoor temperature must be 70º F or higher to perform the tune-up.

To schedule your tune up, please fill out the form on this page or call us at 972-214-7002 to schedule a visit with our experts at the time of your preferences. 

Check our previous Tune Ups for our customers: Before/After


Fill the form bellow to get in touch with our sales representative, or all now calling us: (972) 214-7002

You can count with us

For a reliable, professional and guaranteed HVAC install.

We work with

Quality | Knowledge | Honesty

Residential & Commercial Custom Home Specialist in Dallas, TX

We are a commercial and residential air conditioning and heating repair company in Dallas, TX and surrounding cities.

Juan Tapia
Juan Tapia
Hace 7 meses
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Mondragon Mechanical, es una empresa seria , responsable y siempre tiene una actitud de servicio inmejorable!! Se las recomiendo ampliamente , en mi casa solo confiamos en su servicio para el Aire Acondicionado y Calefacción!! Mondragon The Best!!!
Jesus Cortes
Jesus Cortes
Hace 2 meses
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Muy intalaron todo el equipo hace 11 meses. Y por pequeños detalles les llame y me solucionaron rapido el problema. Personal de oficina y técnicos muy amables.
Alejandra Franco “Franco's Body Shop”
Hace 7 meses
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Yo se los recomiendo usar la compañía de Mondragon’s Mechanical. Desde el momento que los contactamos siempre muy profesional. Sus técnicos muy cuidadosos y limpios para trabajar. Cumplieron con mis expectativas.
Maria Mercado
Hace 3 meses
Read More
La verdad recomiendo al 1000% una compañía súper responsable que a pesar de lluvias tormentas no pararon de hace su trabajo la verdad es confiable su trabajo e impecable Gracias Mondragon company por su súper servicio

No-cost tune-up from ONCOR®!

All fields are required. Certain conditions apply. You will receive an automatic email to arrange a qualification call.