Pool Heater Repair & Replacement
Heater not firing? +1-703-665-5333 — our technicians carry common parts for same-visit repairs.
Pool Heater Types Compared
The right heater depends on how you use your pool, your fuel source, and your budget. We service and install all three types.
Gas Heater
Best for: Fastest heat-up time
Advantages
- ✓Heats pool in hours, not days
- ✓Works regardless of outside temperature
- ✓Lower upfront cost
- ✓Ideal for occasional or seasonal use
Considerations
- –Higher operating cost per BTU
- –Requires natural gas or propane line
Typical installed cost
$1,500 – $3,500 installed
Heat Pump
Best for: Lowest operating cost
Advantages
- ✓Uses ambient air heat — 5× more efficient than gas
- ✓Lower monthly energy cost
- ✓Ideal for daily use in swim season
- ✓Long lifespan (10–15 years)
Considerations
- –Slower heat-up time
- –Less effective below 50°F air temperature
Typical installed cost
$2,500 – $5,000 installed
Solar Heater
Best for: Zero operating cost
Advantages
- ✓Free energy from the sun
- ✓Very low maintenance
- ✓No operating cost after installation
- ✓Extends swim season naturally
Considerations
- –Slower heating; weather-dependent
- –Requires adequate roof or ground space
Typical installed cost
$3,000 – $6,000 installed
Estimates reflect DMV-area market rates for residential pools. Final cost depends on BTU rating, plumbing work required, and permit fees for your jurisdiction.
Common Pool Heater Problems We Fix
Most heater failures come down to a handful of root causes. Our technicians carry common parts and can resolve most issues in a single visit.
Ignition Failure
Gas heaters that click but won't fire often have a faulty igniter, thermocouple, or gas valve. We diagnose and replace the specific component — not the entire unit.
Error Codes & Control Board Issues
Modern heaters display specific fault codes. Our technicians are trained across all major brands and interpret error codes to identify the precise failure point.
Refrigerant Issues (Heat Pumps)
Heat pumps that run but don't transfer heat often have refrigerant leaks or compressor problems. We perform refrigerant diagnostics and work with licensed HVAC-certified technicians for refrigerant service.
Heat Exchanger Corrosion
Improper water chemistry accelerates heat exchanger corrosion. We assess exchanger condition and advise on repair vs. replacement — and review your water chemistry to prevent recurrence.
Pressure Switch & Flow Sensor Failures
Heaters that won't fire despite everything else working often have a failed pressure switch or flow sensor — inexpensive parts that our technicians can typically replace same-day.
Pilot Light & Gas Pressure Problems
Low gas pressure or a dirty pilot assembly prevents consistent ignition. We test gas pressure at the heater, clean or replace pilots, and coordinate with your gas utility when needed.
Our Heater Service Process
Diagnose
We test gas pressure, check flow rates, inspect electrical connections, and read fault codes to pinpoint the root cause — not just the symptom.
Quote & Approve
You receive a clear written quote before any repair work begins. We explain the options and let you decide — no pressure, no surprises.
Repair or Install
We complete the work, test the heater through a full heat cycle, and confirm proper operation before signing off. All work is documented.
Heater Brands We Install & Service
Typical Heater Repair Costs (DMV Area)
Diagnostic visit
$125 – $195
Igniter / thermocouple replacement
$175 – $350
Gas valve replacement
$300 – $600
Heat pump compressor / refrigerant
$500 – $1,200+
Diagnostic fee is typically credited toward repair cost when work is performed. Final pricing depends on heater brand, BTU rating, and required parts.
Complete Service Team
Need other pool equipment serviced?
From pump repair and salt system conversions to automation and leak detection — our certified team handles every aspect of pool equipment service in Virginia, Maryland, and DC.
Related Services
Pool Automation & Smart Controls →
Automate your heater schedule and control target temperature remotely from any smartphone or tablet.
Pool Electrical Services →
All heater installations require proper dedicated circuits, disconnect switches, and GFCI protection.
Pool Pump Repair →
Adequate water flow through your pump is a prerequisite for safe heater operation — we check both.
What Our Customers Say
February 2025
“I had been searching for a new company for my weekly pool maintenance when I came across Beltway Pools, and I'm so glad I did. Sandra has been managing our pool's opening and weekly maintenance, and her attention to detail and expertise are truly outstanding. She has been incredibly patient with all my questions and maintains a friendly and professional demeanor at all times. Thanks to Sandra and her maintenance team, our pool is exceptionally clean and well-maintained. I cannot recommend Beltway Pools enough!”
May 2025
“Beltway Pools saved us when our pool was leaking. The team was quick to diagnose the issue, and Dragan made sure everything was fixed properly. The repair process was smooth and efficient.”
January 2026
“Rob was fantastic at always keeping up communication and walking us through each step of the process for our pool renovation. The pool turned out fantastic and his team made sure all of my questions/concerns were addressed. Couldn’t be happier! Services Swimming pool crack repair, Swimming pool resurfacing, Swimming pool tile repair, Swimming pool equipment repair”
Areas We Serve
Serving homeowners across Northern Virginia, Maryland & Washington, DC.
View all service areasPool Heater Repair — Frequently Asked Questions
How much does pool heater repair cost in Virginia or Maryland?
Pool heater repair costs in the DMV vary by heater type and the nature of the failure:
- Minor repairs (igniter, thermocouple, pressure switch) — $150–$400
- Control board or gas valve replacement — $400–$900
- Heat exchanger replacement — $800–$1,800
- Full gas heater replacement (supply + install) — $1,500–$3,500
- Heat pump replacement (supply + install) — $2,500–$5,000
We diagnose root causes before recommending repair or replacement — and we won't recommend a new unit when a part repair will solve the problem. Contact us for a written estimate.
How long does it take to repair or replace a pool heater?
Most heater repairs are completed in a single visit of 1 to 3 hours, provided the needed parts are in stock or on our truck. Full heater replacements typically take 3 to 5 hours depending on the unit size, whether new gas line modifications are needed, and permit requirements for your jurisdiction. Gas line work may require a separate permit inspection, which can add a day or two to the timeline.
Which pool heater type is most efficient for the DMV climate?
For the Northern Virginia / Maryland climate, heat pumps are the most energy-efficient choice for everyday swim-season use. They use ambient air heat and deliver roughly 5 BTUs of heat per BTU of electricity consumed. However, they slow down when outside temperatures drop below 50°F — which limits their effectiveness in early spring and late fall in the DMV.
Gas heaters excel when you want rapid heat-up (ideal for weekend warriors or occasional users) and reliable performance regardless of outdoor temperature.
Many homeowners opt for a gas heater + pool cover combination — the cover retains heat overnight and the gas heater provides fast warmth when needed. We'll recommend the best fit for how you actually use your pool during your consultation.
My pool heater shows an error code — what does that mean?
Modern pool heaters display manufacturer-specific error codes that point to the fault location. Common codes indicate issues with:
- Flow/pressure switch — heater isn't detecting adequate water flow
- Ignition failure — gas valve, igniter, or thermocouple issue
- High-limit switch trip — overheating due to restricted flow or a failing sensor
- Refrigerant / compressor fault (heat pumps) — refrigerant issue or compressor failure
Our technicians are trained across all major heater brands and decode error codes as part of every diagnostic visit — we identify the root cause, not just the symptom. Schedule a visit for a written diagnosis.