Heater runs but pool water does not reach the set temperature or heats very slowly.

Safety first: Turn off power and gas before opening panels. Do not adjust gas regulators without proper training.

• Verify setpoint and mode: Confirm the Kripsol control is set to the correct temperature and pool/spa mode.
• Use a pool cover: Install and use a thermal pool cover to reduce evaporation and heat loss, especially at night.
• Check gas supply: Have a qualified gas technician verify inlet gas pressure at the Kripsol heater while it is firing. Correct any undersized piping or regulator issues.
• Inspect for scale: If the heater is older or used with hard water, have a professional inspect and, if necessary, chemically descale the Kripsol heat exchanger.
• Confirm sizing: Compare heater BTU rating to pool volume and climate. If undersized, consider upgrading to a larger Kripsol model or adding supplemental heating.