HVAC Troubleshooting

HVAC TroubleshootingOur HVAC Professionals are Always Looking for Trouble…And They Sure Know How to Find It!

Not sure what’s wrong with your heating or air conditioning system? Relax! The HVAC troubleshooting professionals at Horizon Services will accurately diagnose and quickly fix any heating or cooling problem you may have!

Horizon Services is recognized nationwide as a leader in the HVAC industry. Since 1989, we have established an unmatched reputation for quality, professionalism and top-notch customer service. Our service area covers Delaware, Maryland and Southeastern Pennsylvania. We have a strong commitment to timely, reliable and affordable service, and our HVAC troubleshooting expertise is second to none.

Even the smallest HVAC problem can turn into a major expense if it isn’t diagnosed and repaired quickly. At Horizon Services, our HVAC technicians specialize in diagnosing and troubleshooting the root cause of heating and air conditioning problems — big or small. And we deliver quality repair work to correct those problems and reduce the likelihood of them occurring again in the future.

On the air conditioning side, the HVAC toubleshooting technicians at Horizon Services specialize in all areas of air conditioning system repair and service. We are here to service to ensure that your air conditioning system is running efficiently. We pride ourselves on our ability to diagnose and repair any make and model of cooling systems, old or new.

On the heating side, our HVAC troubleshooting services range from preventive maintenance to routine repairs to emergency services.  We service almost any make and model of heating system. We even sell and install new energy-efficient heating and cooling systems.

One of the best HVAC troubleshooting services we offer is our exclusive precision tune-up and cleaning for heating and cooling systems. Performed annually at the start of each heating and cooling system, this preventive maintenance service saves you money in the long run by extending the life and increasing the efficiency of your heating or air conditioning system. It assures you that your system will be operating at peak performance levels when outdoor temperatures are at their coldest or hottest. And it is your best guarantee against furnace or air conditioner breakdowns. Often while performing a precision tune-up, our HVAC troubleshooting technicians can identify and fix small problems long before they become bigger, costlier ones. It’s no wonder that precision tune-ups are among our most popular HVAC troubleshooting services.

At Horizon, we hire only the most professional and best qualified HVAC troubleshooting technicians. Our technicians have years of training, certification and experience. They must meet strict skill requirements and pass drug and background checks before they are hired. You can be confident that they have the HVAC troubleshooting expertise to quickly and accurately diagnose your heating or cooling problem and perform the necessary repair. 

In addition, our technicians are required to attend at least 150 hours a year of additional training to make sure that they stay current on the latest equipment and HVAC troubleshooting techniques in the industry. We hold regular training sessions in our own state-of-the-art training center with our own in-house, N.A.T.E-certified training manager. We feel that this training is absolutely necessary to keep our technician’s HVAC troubleshooting skills sharp and maintain our position as the region’s most knowledgeable HVAC company.  

Horizon Services is committed to our customers’ complete satisfaction. We pride ourselves on our ability to do the job right and clean the first time. Our HVAC troubleshooting work is also guaranteed for two years, no questions asked. And we know the value of your time. That is why offer our exclusive On-Time Service guarantee: if we’re even one minute late, we’ll credit you with the cost of the service call up to $300. We also complete over 99% of our HVAC troubleshooting services and repairs in the same day that our customers call us. For customer convenience, we allow you to schedule appointments as late as 11 p.m. during the week. We also offer weekend appointments.

At Horizon Services, we are committed to being able to meet all of your HVAC needs. We are Pennsylvania, Maryland and Delaware’s number one choice for HVAC troubleshooting, replacement and repair, bar none.


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Horizon Services won’t leave you out in the cold this winter! Furnaces, hot water boilers, heat pumps, thermostats…we fix them all. Our heating technicians are experts in all home heating systems, all makes and models. We even offer a free carbon monoxide check with any heater repair.

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Air Conditioning

When temperatures are up and your air conditioning is down for the count, who are you going to call? Horizon Services, the air conditioning authority in Delaware, Southeastern Pennsylvania and Maryland! We service and repair all makes and models of air conditioners. And if you want to replace your old air conditioner, we sell and install reliable air conditioning systems that can maximize your energy savings and comfort.

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Call Us with Your HVAC Troubleshooting Questions or To Schedule a Service Call!

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Easy Payment Methods for All HVAC Troubleshooting Services:

  • We accept credit cards: Visa, MasterCard, Discover and American Express
  • Senior Citizen discount available
  • Financing Options are available with approved credit
  • Learn About Our Service Partner Plan!

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Horizon Services has been proudly meeting the HVAC troubleshooting needs of businesses and homeowners in Delaware, Southeastern Pennsylvania and Maryland since 1989.

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Horizon Supports Local Sports Teams

Horizon Services is a Proud Partner of the Wilmington Blue Rocks, Philadelphia Union and the Trenton Thunder.