Cold water when you want to swim? Redzone Pools handles gas and heat-pump pool & spa heater repair across Houston, Cypress and the Greater Houston area — fast diagnostics, honest answers, and a same-day quote. Licensed, insured, and fully mobile.
Pool heater repair is the diagnosis and repair of natural gas, propane and electric heat-pump heaters for pools and spas, covering Pentair, Raypak, Jandy, Hayward and Sta-Rite units. Redzone Pools, a licensed and insured mobile pool contractor based in Cypress, provides it throughout Cypress and the Greater Houston area.
A pool heater is a system: burner or compressor, heat exchanger, flow and pressure switches, sensors, igniter, gas valve and control board all have to work together. When one part fails, the whole thing quits — and the error code rarely tells the full story. Redzone Pools has spent 15+ years diagnosing exactly these systems for Houston pool owners, so we find the real cause quickly instead of throwing parts at it.
We repair and install every common configuration — natural gas and propane heaters, electric heat pumps, and spa heaters — from all the major brands: Pentair (MasterTemp & Max-E-Therm), Raypak, Jandy (JXi, LXi, Legacy), Hayward (Universal H-Series) and Sta-Rite. Whatever's on your pad, odds are we've fixed it before. Heading into cold-front season? Book a check before the first cold morning it won't fire. Seeing a code on a Pentair panel? Our MasterTemp error code guide decodes E05, AGS, AFS, HLS and the rest. Hayward Universal H-Series showing IF, LO, HS or SB? That's covered in our Hayward H-Series error code guide, and a Jandy JXi or LXi showing CHECK FLOW, HIGH LIMIT or a flashing LED is decoded in our Jandy heater fault code guide. Heat pump stopping on cold mornings? See why a pool heat pump stops heating in cold weather, and for a code on a Hayward heat pump, our Hayward heat pump error code guide, or for a Pentair UltraTemp, our UltraTemp error code guide.
Ignition, gas-valve, pressure-switch and heat-exchanger repairs on natural gas and propane units.
Compressor, fan, refrigerant and control-board diagnostics for energy-efficient electric heat pumps.
Spa and spillover heaters dialed in for fast, comfortable soaks in any season.
If your heater is doing any of these, give us a call — most are a repair, not a replacement:
We diagnose the whole system, show you what's wrong, and give you a fair, up-front quote before any work starts. New to it? Our guide covers the common reasons a pool heater won't heat.
Not every heater is worth repairing — but plenty that get written off just need one part. We'll tell you honestly which side of the line yours is on, based on its age, the cost of the fix, and the condition of the heat exchanger:
If a new heater is the right call, we install high-efficiency gas heaters and heat pumps sized correctly for your pool or spa — old unit out, new one in, done to code so your warranty stays intact.
Houston's hard water is tough on pool heaters. High calcium scales up the inside of the heat exchanger, chokes water flow, and forces the unit to work harder for less heat — one of the most common reasons a heater stops keeping up or fails early. Add our humid, salt-air-adjacent climate and the long shoulder seasons that keep heaters and spas running much of the year, and equipment here simply sees more stress than the manufacturer's average.
Knowing that changes how we diagnose. We check for scaling and flow problems first, protect the new heat exchanger on installs, and give you simple maintenance guidance so the repair lasts. It's the difference between a local team that services these pools every day and someone guessing from a manual.
We keep heaters running across The Woodlands, Spring, Katy, Sugar Land, Cypress and the wider Greater Houston area.
We install as well as repair. If the diagnosis comes back as a heater that isn't worth saving — or you're adding heat to a pool or spa that never had it — we size, supply and fit the new unit, and handle the gas or electrical side under our TDLR license.
Sizing comes first, not last. An undersized heater runs constantly and never quite gets there; an oversized one costs more than it needed to. We size on the pool's volume, whether there's an attached spa, how quickly you want it warm and how you actually use it. Pentair's MasterTemp line, for example, runs from 175,000 to 400,000 BTU across natural gas and propane — picking the right point on that range matters more than picking a brand.
Gas heater or heat pump is the other half of the decision, and it is not a close call in both directions: a gas heater heats on demand in any weather, while a heat pump costs less to run but needs hours rather than minutes and fades as the air cools. We fit both and we'll tell you which suits your pool — the full comparison, in the manufacturers' own words, is in repair or replace a pool heater.
Installed pricing with us is roughly $4,500–$5,000 for a gas heater and $6,000–$6,500 for a heat pump, and financing is available if the timing is awkward — see how financing works. We service Pentair, Hayward and Jandy, and we'll give you the repair number alongside the replacement number whenever it's close.
Houston heaters sit idle from roughly April to October, and the single busiest day of our heater year is the morning after the first real cold front — when thousands of them are asked to fire at once and a share of them won't.
Fire yours once in early October instead. On a warm afternoon, with technicians available, a fault is a scheduled repair. The same fault at 6am on the coldest morning of the year is an emergency call in our busiest week, and the part you need is the part everyone else needs too.
What we find on those first-fire calls is usually not a worn-out heater: it's pests in the burner tray, moisture where it shouldn't be, or a fouled flame sensor that looks exactly like a dead igniter. The whole pattern is in why Houston heaters won't fire on the first cold morning. If yours is already showing a code, the MasterTemp, Hayward H-Series and Jandy JXi and LXi guides decode them.
“I contacted several companies for bids to install a spa heater … He explained my options and recommended features I hadn’t considered, including a bypass that prevents water from flowing through the heat exchanger when the heater isn’t running. Redzone’s initial bid wasn’t the lowest, but their pricing was transparent …”
“What I appreciated most was their honesty. My pool heater was broken, and since I never use it, instead of trying to sell me an expensive repair or replacement, he helped me bypass the heater and got everything working properly again.”
Every review on our Google Business Profile is five stars, from homeowners across Cypress and Greater Houston.
The most common causes are a scaled-up heat exchanger, low water flow (a dirty filter or a failing pump), or a bad thermostat or temperature sensor. Because several issues look identical from the deck, we test the whole system to pinpoint the real one before quoting a fix. If only the spa won't heat, check the valve actuators first: see spa won't heat but the pool does.
Short-cycling like that is usually a water-flow or safety-switch issue — a clogged filter, a weak pump, a faulty pressure switch, or the high-limit tripping on a scaled exchanger. We trace it to the root cause so it doesn't come right back. Our guide to a pool heater that turns on then off goes through the checks.
It depends on the part and the problem. A sensor, igniter or pressure switch is a modest repair; a corroded heat exchanger costs more. We give you a clear, free quote up front — before any work starts — so there are no surprises.
If the unit is reasonably sound and the failed part is straightforward, a repair is usually the better value. If the heat exchanger is corroded through or the heater is well past its service life, replacement makes more sense — our guide to repairing versus replacing a pool heater walks through how we weigh it, including gas versus heat pump. We give you an honest recommendation either way — no pressure.
Yes — gas heaters and heat pumps, for pools and spas, across Houston, Cypress and the Greater Houston area. We size the unit to the pool rather than fitting whatever is on the truck, and we handle the gas or electrical connection under TDLR license TICL #1465. Installed pricing runs roughly $4,500–$5,000 for a gas heater and $6,000–$6,500 for a heat pump, and we quote a firm number before any work starts.
It depends on the pool's volume, whether there's an attached spa, how fast you want it warm and how often you use it — which is why we size it on site rather than over the phone. As an idea of the range, Pentair's MasterTemp gas heaters run from 175,000 to 400,000 BTU. Undersized heaters never quite reach temperature on cold days; oversized ones cost more up front than the pool needed.
Yes — natural gas, propane, and electric heat-pump heaters, plus spa heaters. We service all the major brands including Pentair, Raypak, Jandy, Hayward and Sta-Rite.
Roughly 5–10 years for a gas heater and 10+ for a well-kept heat pump — but Houston's hard water shortens that when scaling goes unchecked. Keeping the water balanced and the exchanger clean is the single biggest thing you can do to make yours last.
Redzone Pools is your licensed and insured team for pool and spa heater repair and installation across Houston, Cypress and the Greater Houston area. With 15+ years in the pool industry, we bring honest evaluations and repairs built to last — no pressure, no time-outs.
TICL #1465 — work done to code so warranties stay intact.
Straight answers and quick diagnostics — usually a same-day quote.
Trusted heating expertise for Greater Houston pool owners.
Tell us what your pool or spa heater is doing and we'll get you a straight answer and a fair quote — usually same day.
A big repair or equipment replacement doesn't have to be paid all at once. Redzone Pools offers financing through Wisetack — ask us about monthly payment options when you request your quote.
Financing through