HVAC Thermostat Repair in Fredericksburg, VA, and NOVA
Regain Control of Your Comfort with Thermostat Repair Services
If your HVAC system isn’t responding the way it should—or if your indoor temperature never seems quite right—your thermostat may be the culprit. Small issues like delayed response times or inaccurate readings can lead to bigger problems with comfort and energy usage. At OHA HVAC, Plumbing, Chimney and Fireplaces, we offer professional HVAC Thermostat Repair in Fredericksburg and Fairfax, VA, NOVA and surrounding areas to restore comfort, efficiency, and full system control to your home or business. Whether your unit is outdated or your smart thermostat isn’t syncing properly, we’ll get to the bottom of it quickly and effectively.
Call 703-213-5161 today to schedule fast, expert service and get your system back on track!
Smart, Reliable Service You Can Feel
Your thermostat is the brain of your HVAC system. When it’s not working properly, everything from heating and cooling cycles to energy usage can be affected. At OHA HVAC, Plumbing, Chimney and Fireplaces, our trained technicians diagnose and repair all types of thermostat issues—whether you have a basic manual unit or a modern smart thermostat. We deliver fast diagnostics, clear explanations, and dependable repairs designed to keep your HVAC system running smoothly.
Common Thermostat Problems We Repair
Thermostat problems can lead to uneven temperatures, high energy bills, or a complete system shutdown. Our team identifies the root of the issue and restores precise control over your HVAC system. Our thermostat repair services include:
Inaccurate temperature readings
Short cycling or continuous running
Loose or faulty wiring connections
Non-responsive digital displays
Malfunctioning sensors or relays
Smart thermostat connectivity issues
Compatibility problems with new HVAC units
Programming or scheduling errors
We work with all major thermostat brands and models, and we’ll let you know when repair makes sense—or when it’s time to consider an upgrade.
Call Now for Expert Thermostat Repairs
If your thermostat isn’t doing its job, trust the experts at OHA HVAC, Plumbing, Chimney and Fireplaces for dependable HVAC Thermostat Repair in Fredericksburg and Fairfax, VA, NOVA and surrounding areas. We’ll restore your ability to control your comfort and help improve your system’s overall performance.
Call 703-213-5161 today to schedule your thermostat service and enjoy worry-free heating and cooling all year long!
Frequently Asked Questions About HVAC Thermostat Repair
How can I tell if my thermostat is broken?
Common signs include inconsistent temperatures, no response when adjusting settings, or the system not turning on or off as expected.
Can a faulty thermostat affect my energy bills?
Yes—if your thermostat isn’t reading temperatures accurately, your HVAC system may overwork or run inefficiently, leading to higher utility costs.
Should I repair or replace my thermostat?
If your thermostat is outdated, replacing it with a modern programmable or smart model can improve comfort and efficiency. Minor issues, however, can often be repaired quickly.
Most Recent Pins (14)
Brian Hatfield
An HVAC technician provided an estimate for a heating and cooling system in Vienna, Virginia. The assessment included the current system's condition and recommendations for upgrades or replacements based on energy efficiency and performance.
Brian Hatfield
A technician provided an estimate for a new HVAC system in Fredericksburg, Virginia. The evaluation included system sizing, placement, and installation planning based on the property's requirements.
Brian Hatfield
A technician in Fredericksburg, Virginia inspected two HVAC systems. One system had a failed capacitor, and the other had a non-working outdoor fan motor. The technician explained repair and replacement options to the customer.
Scott Brown
A technician in Herndon, VA performed a maintenance inspection on a 6-month-old HVAC system. The inspection confirmed safe operation and correct electrical performance. The technician recommended adding a surge protector to prevent power damage and installing an air scrubber to help reduce allergens, VOCs, and biological particles, improving the system’s indoor air quality.
Scott Brown
A technician in Herndon, VA diagnosed a no-cooling issue caused by a clogged drain line in an attic heat pump system. The blockage triggered a safety switch, cutting power to the Nest thermostat. Inspection also revealed significant rust on the evaporator coil, which may require future repair. Temporary functionality was restored.
Scott Brown
A technician in Fredericksburg, Virginia cleared a clogged HVAC drain line, re-glued a leaking p-trap, and completed a full heating system inspection. The visit included correcting a burner defect, cleaning the flame sensor, and verifying system operation within manufacturer specifications. The heating system now functions correctly without faults.
Scott Brown
OHA HVAC Plumbing Chimney and Fireplaces installed a 2-ton American Standard Gold Series split heat pump system in Locust Grove, VA. The project included a new heat pump, air handler, thermostat, and heat strip, all using R454b refrigerant, and was completed following the PricebookPlus Sales Agreement.
Scott Brown
An HVAC technician in Fredericksburg, VA cleared a clogged condensate drain causing an emergency AC shutdown. They removed standing water, restored proper drainage, restarted the system, and confirmed cooling. They advised installing a condensate pump, rerouting the drain, cleaning the air handler, and adding an air purifier to improve long-term operation and indoor air quality.
Scott Brown
A technician diagnosed an HVAC system in Woodford, VA that was shutting off with an A04 fan error. Inspection found a tripped flood prevention device caused by a clogged drain line. The homeowner cleared the line, restoring proper function. No further repairs were needed beyond diagnostics.
Scott Brown
OHA HVAC Plumbing Chimney and Fireplaces installed a 3-ton American Standard split heat pump system with air handler, thermostat, and heat strip at a home in Arlington, VA. They later connected the humidifier by modifying the return trunk line, rerouting the waterline, and adding a drain. The existing humidifier control board required replacement.
Scott Brown
Technicians completed cooling system maintenance in Locust Grove, VA. They flushed the drain line, cleaned the indoor coil, and inspected a single-zone American Standard unit. They found the 28-month-old Air Scrubber cell ineffective and recommended replacement. The HVAC system is functioning correctly after service.
Scott Brown
A technician in Purcellville, Virginia, explained the thermostat's circulation mode to the homeowner and flushed the condensate drain line to restore proper flow. The HVAC system was tested and confirmed to operate normally with no further issues found.
Scott Brown
A technician in Fredericksburg, VA diagnosed and resolved a furnace AUX IN2 error code triggered by a tripped float in the EZ Trap. The team cleaned the trap, restored proper drainage, and cleared the error. The HVAC system resumed normal operation without requiring a follow-up visit.
Scott Brown
An HVAC technician completed routine air conditioning maintenance in Alexandria, VA. The system showed strong performance with accurate temperature and subcooling readings. The technician inspected and confirmed proper operation of safety components and replaced the air filter. The UV cell in the air scrubber is due for replacement after two years of use.
