How much does a condensate pump replacement cost?

Prices checked October 2026. Wages: BLS, May 2025.

A condensate pump is the small box with a water reservoir that sits beside a high-efficiency furnace, air handler or AC coil. It fills, hums for a moment, empties and goes quiet. The range above covers a technician's visit to install a new tank-type pump. It adds the online list price of common furnace and AC condensate pumps from retailer listings to two hours of billed time: about an hour of hands-on work and an hour for travel and diagnosis. That time is priced from local HVAC technician wages and marked up to cover a service company's costs.

Air conditioners and heat pumps pull water out of the air as they cool. Condensing furnaces, boilers and tankless heaters make water as they burn gas. Where that water can't drain downhill to a floor drain, the pump collects it and pushes it through a small tube to a drain or outside. When the pump fails, water backs up. Little Giant explains that a wired-in overflow safety switch shuts the unit off before the pan overflows. Without one, the water ends up on the floor.

What moves the price

Pump type and features

Basic tank pumps are inexpensive. Models with a built-in safety switch, higher lift for long vertical runs, or a design for mini-split heads cost more. Mini-split pumps list for roughly two to three times a standard furnace pump at the same retailer.

Safety switch wiring

The safety switch is what turns a pump failure into a no-cooling call instead of a water-damage claim. Wiring it into the equipment's control circuit adds a little time. Ask for it if your current pump lacks one.

Drain line condition

Often the pump is fine and the line is clogged with algae or sludge. Clearing or replacing tubing and checking the trap are part of the diagnosis. A line buried in a finished ceiling or wall costs more to reroute.

Local labor cost

Billed time is based on HVAC wages for your metro or state at the 25th, median and 75th percentiles. Plumbers sometimes do this work too, at similar rates.

Repair or replace?

Nobody repairs a failed condensate pump. It gets replaced, and that makes sense on any furnace, AC or heat pump that otherwise works, because the pump has nothing to do with the main equipment's age. The exception is a pump that dies every couple of seasons. Ask whether the drain line, the trap or acidic furnace condensate (which some installers neutralize) is the real cause, and whether a gravity drain route is possible. Fix a recurring problem once instead of paying for the same visit again and again.

Run the numbers for your unit.

What a complete quote lists

• Pump brand and model, including lift rating and whether it has a safety switch
• Whether the safety switch was wired to shut down the equipment
• Drain line cleaning or new tubing, and where the line discharges
• Check of the equipment's trap and drain pan
• Service call or diagnostic fee
• Labor or flat repair price
• Warranty on the pump and on the labor

Paste your quote and we'll tick these off for you.