Spa heats very slowly or cannot reach set temperature in cold weather.

Safety first: Electrical checks should be performed by a qualified person.

• Check cover condition: Inspect the Coast Spas cover for waterlogging, tears, or gaps. Replace if heavy or not sealing properly.
• Inspect cabinet: Ensure all access panels are in place and insulation has not been removed or compressed.
• Verify voltage: Measure supply voltage at the spa. Low voltage reduces heater output; correct any wiring or breaker issues.
• Reduce heat loss: Use the cover whenever the spa is not in use and avoid frequent large water additions with cold water.