Is $4,500 to replace a Pentair pool/spa heater a fair price?
Project Details
My Pentair pool/spa heater turns on and off and won’t reach the selected temperature. My pool service company tried replacing two different parts based on error codes, but the issue remains, so they removed the new parts and didn't charge me. They suggested I call Pentair for a technician to diagnose it. I am the third homeowner, and I believe this is the original heater from 2009. The previous owner had issues about 5 years ago and used parts from a used Pentair heater to fix it. I'm curious if a 16-year-old heater is worth repairing or if I should just replace it. I'm also wondering if Pentair heaters have improved since 2009, specifically the Mastertemp 400 model, and if a stronger heater might be worth the marginal extra cost for my larger pool/spa.
Quote Details
This quote is for the replacement of an existing pool/spa heater. The homeowner is considering replacing the current 2009 Pentair Mastertemp 400 heater with a new one, potentially the same model or a stronger Pentair heater suitable for a larger pool/spa. The existing heater is malfunctioning, turning on and off and failing to reach the selected temperature, despite previous repair attempts by a pool service company. The quote covers the cost of a new unit and its installation. The homeowner is evaluating whether to invest in a new heater versus repairing the old 16-year-old unit. They are also curious about improvements in Pentair heaters since 2009 and the potential benefit of a stronger model for their pool/spa size. The quote is for a new heater, implying the full cost of the unit and its installation. - Scope: Replacement of existing pool/spa heater - Current Heater: Pentair Mastertemp 400 (from 2009) - New Heater Consideration: Pentair Mastertemp 400 or a stronger Pentair model - Reason for Replacement: Current heater turns on and off, won't reach selected temperature, and previous repair attempts by pool service company failed.
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More Details
Category
Pools
Price
$4,500
Quote Date
October 2, 2025
Location
California
Heater Included?
No
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