Oil furnaces, propane systems and homes with more than one unit all need careful yearly service. Service First Heating & Air maintains heating systems at Marshall farmhouses, estates and custom homes. We clean, adjust and safety-test each system and give you upfront, transparent pricing for every visit.
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Home › Service Areas › Warrenton Area › Marshall › Furnace Maintenance

An oil furnace that skips its yearly service can lose efficiency quickly as soot builds up on the heat exchanger. A propane furnace with dirty burners wastes fuel. And a large home with several systems is more likely to have one fail if none are being checked. Around Marshall, where many properties rely on oil, propane or heat pumps, regular maintenance protects your comfort and your fuel budget.
We handle tune-ups for every system on your property in one visit, whether that is a single oil furnace in a farmhouse or several units in a custom home. Read about our preventative maintenance services.
Your safety and comfort come first. Our team is fully insured and trained to handle all AC services with precision.
We use only trusted brands like Rheem to ensure long-lasting performance and energy efficiency.
From 10% discounts for veterans and seniors to flexible financing plans, we make cool comfort affordable.
Seasonal tune-ups and regular maintenance keep your system efficient, reliable, and ready for summer.
These problems build slowly, so a furnace can seem fine until the first long cold spell exposes them.
Marshall is a village in northern Fauquier County along I-66, surrounded by horse farms and estate properties in Virginia hunt country. Housing here includes older farmhouses and larger custom homes, and rural properties often rely on oil, propane or heat pumps. That variety means no two tune-ups are quite the same.
Older farmhouses may have oil furnaces or boilers tied into ductwork that has been changed many times. Larger custom homes often have multiple systems serving different floors or wings. Horse farms add hay dust and dirt that clog filters and coat coils. And Virginia’s cold winter nights, along with wide temperature swings in fall and spring, keep these systems running hard for months. A yearly visit tailored to your equipment keeps everything working together.
Marshall is about 11 miles from our Warrenton shop, and we plan hunt country tune-ups with enough time to service every system on the property without rushing. If a guest house, office or finished outbuilding has its own unit, tell us when you book and we will include it.


A preventative maintenance plan is an easy way to keep multiple systems on one schedule.

We take the time to do each system right, whether you have one furnace or several. On larger properties, we keep notes on each unit so you know its condition, what was serviced and what may need attention in the coming seasons. That makes planning future repairs or replacements much easier.
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Christopher McCraeTrustindex verifies that the original source of the review is Google.
Awesome !!Posted on Google![]()
ahushouraTrustindex verifies that the original source of the review is Google.
Excellent locally owned business. They replaced our AC system two years ago and they regularly service it. Great prices and service are what make them the best. I highly recommend them!Posted on Google![]()
Sheryl ChildsTrustindex verifies that the original source of the review is Google.
Seth Phillips Senior HVAC technician gave exceptional service, was prompt, efficient, knowledgeable and extremely helpful! I look forward to doing business with this company!Posted on Google![]()
Joshua WehrleTrustindex verifies that the original source of the review is Google.
Another incredible experience with the best professionals you could ask for - timely - professional - courteous. If you need heating, cooling, anything - you need to call these guys. Awesome job!Posted on Google![]()
Brittney BrennanTrustindex verifies that the original source of the review is Google.
I met Seth a few years ago when I had another company install a new AC unit improperly. He fixed it and ended up installing a new secondary unit for me a short time later. Ever since then I’ve been a faithful customer and go to Seth for all of our HVAC needs and concerns. I am so thankful to have found a solid company after having countless companies take my money and give me the run around. I cannot recommend Seth or this company enough!! They will take the absolute BEST care of you!!Posted on Google![]()
Chris DixTrustindex verifies that the original source of the review is Google.
My heat pump broke in the middle of winter. I called several companies before this one and they all couldn't get to me for a whole month! I called this company and they were able to send someone to take a look at the heat pump the same day. This offered me a lot of relief as I wanted to resolve the broken heat pump as soon as possible so that I didn't have to wear a coat inside my own house or worry about frozen pipes. The technicians were all very respectful of my property and cordial. I ended up getting a new heat pump because we would have had to replace most of the parts of the old one. The price for the new heat pump was fair. Would definitely recommend giving these guys a shot.Posted on Google![]()
Ellen NosalTrustindex verifies that the original source of the review is Google.
Best people ever!Posted on Google![]()
Bryan HunsakerTrustindex verifies that the original source of the review is Google.
Professional friendly service. They do a great job! They fix systems not just change units like the other guys!Posted on Google![]()
Michael HooksTrustindex verifies that the original source of the review is Google.
Always outstanding communication, timeliness, prices and service. I would highly recommend this company.Load more
Call (540) 690-4280 or schedule online to get your systems ready for winter. Explore all our Marshall heating and cooling services.
An oil furnace tune-up typically includes replacing the nozzle and oil filter, cleaning the electrodes and combustion area, checking the fuel pump and testing the burner. We also inspect the flue and check for carbon monoxide. For the many Marshall properties that heat with oil, this yearly service helps keep the furnace clean and dependable.
Oil does not burn as cleanly as gas or propane, so a small amount of soot forms over time. A worn nozzle or poorly adjusted burner makes it worse. Soot coats the heat exchanger and acts like insulation, so less heat reaches your home. Yearly cleaning keeps efficiency up.
Yes. Many larger homes and estates around Marshall have more than one heating and cooling system. We can service each furnace and heat pump during a single visit, check thermostats and make sure all systems work together. Let us know how many systems you have when you book so we can plan the time needed.
Late summer or early fall is best, before you need steady heat. That is also a good time to schedule your oil delivery. If your furnace has been making smoke, smells or noises, do not wait. Call us at (540) 690-4280 and we will get it checked.
They can. Hay dust, dirt and debris from barns and riding areas can find their way into your home and your HVAC system. That means filters may need changing more often, and coils and blowers may need extra cleaning. During Marshall tune-ups, we check for this and give you tips to keep dust under control.
Need something else for your home in Marshall? Explore related services and nearby areas we cover from our Warrenton service area.
From emergency repairs to full system replacements, our expert HVAC team is ready to help—day or night. Experience reliable service, honest pricing, and total peace of mind.