Why Your Pool Heater Isn’t Working And How to Fix It Fast

A technician in a beige shirt and green pants installs an outdoor air conditioning unit. Tools are on a surface nearby, with trees in the background.

There’s nothing worse than planning a relaxing swim, only to find your pool water icy cold. When your pool heater stops working, it can bring your entire summer to a halt. Fortunately, most heater issues are solvable—and fast—when you know what to look for.

At Gorlin Pools, we see a range of heating problems every season. Whether it’s a mechanical failure or a simple maintenance oversight, our experienced technicians can diagnose and repair your system quickly.

Common Pool Heater Issues:

Dirty or Clogged Filter
Restricted water flow due to debris buildup can prevent your heater from operating efficiently—or at all.

Low Water Pressure
When your water level drops too low or the pump isn’t running at full capacity, the heater may shut off automatically as a safety feature.

Ignition Failure or Pilot Issues
For gas heaters, ignition problems are common and often tied to dirty burners, faulty sensors, or gas flow disruptions.

Corrosion or Scaling
Over time, minerals in your water can cause buildup inside the heater, reducing heat transfer and triggering system errors.

What You Shouldn’t Do:
Don’t ignore a non-heating pool. A broken heater can lead to more serious issues in the plumbing or electrical system—and delay your pool enjoyment even longer.

What to Do Instead:
Schedule a visit from a certified technician. At Gorlin Pools, we’ll run a full diagnostic and get your system back online without unnecessary replacements or guesswork.

Better Yet? Prevent It Entirely.
Our Weekly Maintenance Program keeps your pool’s systems—including heaters—running smoothly year-round. We handle filter cleaning, water balance, and equipment checks so issues are caught early.

Healthy, Safe, Clean, Sparkling, Crystal-Clear Pool Water…EVERY DAY.
Let’s keep your pool warm and ready to go. Call Gorlin Pools today to schedule your heater check – (732) 323-8200.

FREE Gorlin Pools Weekly Maintenance Checklist. Submit now to receive and extra free bonus: Pool Maintenance Record Keeping Form.