Your pool equipment is working hard every day — circulating hundreds of gallons of water, filtering out debris, and keeping your chemistry balanced. When something goes wrong, it's usually pretty obvious. The water turns cloudy, the pump makes a noise it didn't make before, or the heater just won't kick on.

The good news is that many common equipment problems have straightforward causes. Here's how to diagnose the most frequent issues we see on service calls across NWA.

Symptoms: The pump runs but you hear a high-pitched whine, the pressure gauge reads zero, and there's no flow at the returns.

Likely causes:

• Air leak on the suction side (check the pump lid o-ring and all unions on the suction line)
• Water level too low — the skimmer is sucking air
• Clogged skimmer basket or pump basket
• Closed or partially closed suction valve

What to do: Check the water level first — it should be at the midpoint of the skimmer. Then check and clean both baskets. Inspect the pump lid o-ring for cracks or debris and lubricate it with a silicone-based lubricant (never petroleum-based). If you see bubbles in the pump basket while it's running, you have an air leak somewhere on the suction side.

Symptoms: Loud grinding, screeching, or rattling coming from the pump motor.

Likely causes:

• Worn motor bearings — this is the most common cause of grinding noise
• Debris caught in the impeller
• Cavitation (the pump is starved for water)

What to do: A grinding noise from the motor almost always means the bearings are failing. This isn't a DIY fix — the motor will need to be rebuilt or replaced. Continuing to run a pump with bad bearings will eventually cause the motor to seize completely, which is a more expensive repair. Call a technician sooner rather than later.

Symptoms: Returns have noticeably less flow than normal, pressure gauge reads lower than usual.

Likely causes:

• Clogged pump basket or skimmer basket
• Dirty filter (most common cause)
• Partially closed valve
• Clogged impeller

What to do: Start with the baskets — clean them both. Then check your filter pressure. If it's 8–10 psi above your clean starting pressure, the filter needs to be cleaned. A dirty filter is the number one cause of weak flow and is often overlooked.

Symptoms: Water is hazy or cloudy even though the pump and filter are running normally.

Likely causes:

• Filter needs cleaning (most common)
• Filter media needs replacing (sand filters should have sand replaced every 5–7 years)
• Chemistry imbalance — high pH, low chlorine, or high calcium hardness can all cause cloudiness
• Algae bloom in early stages

What to do: Check your filter pressure first. If it's elevated, clean the filter. If the pressure is normal, test your water chemistry — pH above 7.8 is a very common cause of cloudy water. If chemistry is balanced and the filter is clean, you may be dealing with early-stage algae and need to shock the pool.

Symptoms: Fine sand or grit appearing on the pool floor near the return jets.

Likely causes:

• Broken lateral inside the filter (the plastic fingers at the bottom of the sand bed)
• Channeling in the sand bed (water is finding a path through the sand rather than filtering through it)
• Sand level too high

What to do: This requires opening the filter and inspecting the laterals. A broken lateral needs to be replaced. If the sand is channeled, it typically needs to be replaced entirely. This is a job most homeowners can do themselves with a filter sand replacement kit, but it's messy and time-consuming.

Symptoms: White powder appearing in the pool after adding DE to the filter.

Likely causes:

• Torn or damaged filter grid
• Cracked manifold
• Too much DE added

What to do: Inspect the grids when you open the filter for cleaning. Even a small tear will allow DE to pass through. Replacement grids are available for most filter models and are a straightforward swap.

Symptoms: Heater attempts to start, you may hear clicking, but it doesn't fire. Error code on the display.

Likely causes:

• Low gas pressure (for gas heaters)
• Dirty or failed igniter
• Pressure switch not sensing adequate flow
• Clogged heat exchanger

What to do: First, make sure your gas supply valve is fully open and that other gas appliances in your home are working normally. Check that your pump is running and flow is adequate — most heaters have a flow switch that prevents ignition if water flow is insufficient. If flow is good and gas is on, the igniter or pressure switch may need replacement. Check your heater's error code against the manual for specific guidance.

Symptoms: Heater fires and runs, but pool temperature doesn't rise or rises very slowly.

Likely causes:

• Heat exchanger scaling (calcium buildup insulating the heat exchanger)
• Heater undersized for pool volume or ambient conditions
• Heat loss from wind or evaporation exceeding heat input

What to do: A scaled heat exchanger is common in NWA where calcium hardness tends to run high. Descaling requires an acid wash of the heat exchanger — this is a job for a qualified technician. If the heater is properly sized and the heat exchanger is clean, consider a solar cover to reduce heat loss overnight.

Symptoms: Heater fires, runs for a few seconds or minutes, shuts off, then tries to restart.

Likely causes:

• High limit switch tripping due to low flow
• Dirty filter restricting flow through the heater
• Faulty high limit switch

What to do: Clean your filter first — restricted flow is the most common cause of high limit trips. If flow is adequate and the heater still cycles rapidly, the high limit switch may need replacement.

Some equipment issues are safe to diagnose and fix yourself — cleaning baskets, replacing o-rings, backwashing a filter. Others involve gas lines, electrical components, or pressurized systems where a mistake can be dangerous or expensive.

Call a professional when:

• You're dealing with gas line connections or gas pressure issues
• The motor needs to be rebuilt or replaced
• You're seeing error codes you can't resolve with the manual
• Water is leaking from equipment fittings under pressure
• You've tried the basic fixes and the problem persists

AquaCare provides equipment diagnostics and troubleshooting for pool owners across Fayetteville, Springdale, Rogers, Bentonville, Cave Springs, Centerton, Elm Springs, Prairie Grove, Elkins, and surrounding NWA communities. If your equipment is giving you trouble, reach out for a service call — we'll diagnose it and give you a straight answer on what it needs.