Maryland · Pool Repair & Equipment Service · Updated 2026
Compare 39 pool repair companies in the Gaithersburg area for equipment repair and replacement. Ratings, review counts, contact details and 2026 planning prices for the most common jobs are below. 29 are listed as specialists for this work; the rest are weekly service routes that routinely handle it. This page shows the top 20.
Every pool service company in Gaithersburg: compare all 43 →
Ordered by customer rating and review count across the Gaithersburg area. Listings include the available rating, contact details and location; confirm current credentials and scope directly.
Looking for weekly service in general? The Gaithersburg pool service directory ranks all 43 maintenance companies in the area.
A diagnostic or service call in Gaithersburg typically runs $80–$160, often credited against the repair. The common jobs:
| Job | Typical Gaithersburg price |
|---|---|
| Service call / diagnostic | $80–$160 |
| Pump motor or seal replacement | $325–$850 |
| New variable-speed pump, installed | $850–$2,700 |
| Heater repair (igniter, sensor, board) | $150–$550 |
| Heater or heat pump replacement | $2,700–$7,000 |
| Filter rebuild (grids, cartridges, laterals) | $150–$550 |
| Salt cell replacement | $550–$1,200 |
| Automation / controller install | $1,600–$4,300 |
Maryland labor rates are above the national baseline used for these estimates, mainly on labor and permitting. Parts are priced nationally, so the spread between quotes usually comes from labor, brand and whether a repair or a replacement is recommended — ask for both numbers when a component is more than ten years old.
Photograph the pump, filter, heater and controller labels (model and serial). It saves a diagnostic visit and lets the tech bring the right parts.
Gaithersburg market
4.6 average customer rating · 839 reviews · 39 companies · 29 specialists
See All on the Map →39 pool repair companies in the Gaithersburg area. 29 are listed as specialists for this work; the rest are weekly service routes that routinely handle it. The ranked companies average 4.6 stars across 839 customer reviews. PoolPad orders the list with a weighted score that combines customer rating and review count, so a long track record counts for more than a handful of scores.
April openings, weekly summer service through high humidity and algae pressure, and a leaf-heavy fall close define the year. Winter cover checks after storms help protect the work until spring. Freeze damage — cracked pump housings, split filter tanks and burst above-ground plumbing — is the classic spring repair here, and a documented winterization is the best defense.
For statewide rankings, city counts and Maryland prices, see the Maryland pool repair directory, or check the nearby cities below.
Repair a component under about eight years old with a single failed part. Replace when the unit is older than ten years, when the repair is more than half the cost of a new one, or when a more efficient model — a variable-speed pump or a heat pump — pays back through lower Maryland energy bills within a few seasons. Ask for both quotes and the expected life of the new unit.
A service call or diagnostic in Gaithersburg, MD typically runs $80–$160, often credited against the repair. Pump motor or seal work runs $325–$850; a new variable-speed pump installed $850–$2,700; heater repairs $150–$550 and a heater replacement $2,700–$7,000; filter rebuilds $150–$550; a new salt cell $550–$1,200. Maryland labor is above the national baseline used for these estimates, mainly on labor and permitting. Get the repair and replacement price when equipment is more than ten years old.
Repair when the pump is under about eight years old and one part failed — a shaft seal, capacitor or lid o-ring is a $325-class fix. Replace when the motor is more than ten years old, the repair is more than half the cost of a new unit, or you are still running a single-speed pump: a variable-speed model typically cuts pump electricity by 50–80% and is required for most new installs under federal efficiency rules.
The most common causes are low water flow (dirty filter, closed valve or a failed pressure switch), a failed igniter or thermistor, a tripped high-limit switch, gas supply problems or a control board fault. Check filter pressure and valves first; if flow is fine, a heater technician can test the switches and board in one visit. Repairs typically run $150–$550, and units past 12–15 years are usually replacement candidates at $2,700–$7,000.
Pump motors typically last 8–12 years, filter cartridges 2–4 years, DE grids 5–10 years and filter tanks 15–25 years. Gas heaters last 10–15 years and heat pumps 10–20 with clean water and steady flow. Salt cells run 3–7 years depending on runtime and calcium scaling. Balanced water and clean filters are the cheapest way to reach the long end of those ranges.
The outdoor season in Gaithersburg runs mid-May through September — about 4 months unheated. A full professional winterization each fall protects plumbing and equipment through the freeze, and spring openings cluster into the same few weeks. Mid-May through September, humid through the middle and stretched by heaters on both ends. Winters freeze properly, so a full close remains the standard even in milder Bay-side microclimates.
HYDRATECH LLC has the highest customer rating on this Gaithersburg list at 5 stars across 54 reviews. Millennium Pools & Spas, LLC has the largest review count (139 reviews at 4.4 stars). PoolPad orders the list with a weighted score that combines customer rating and review count, so a long track record counts for more than a handful of scores.
Maryland licenses home improvement work through MHIC — verify the license number and insurance before signing. County permitting (and it varies meaningfully county to county) covers the pool, electrical, and residential-code barrier requirements; waterfront lots can add critical-area review. Builders who work your county weekly will quote realistic timelines.
Often, yes. Most manufacturers give a longer warranty — commonly three years instead of one — when equipment is bought and installed through a qualified pool professional, and some void coverage for online purchases installed by the owner. Ask the repair company whether it is a warranty station for your brand and keep the installation invoice with the serial number.
Check pool repair in cities near Gaithersburg, or open the Maryland directory for every listed market in the state.
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