How do I fix the Error code E90 on my Intex E90?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The E90 error code on an Intex pool heater indicates that the unit is not receiving proper voltage. This can be caused by a number of things, including a tripped circuit breaker, a loose wire connection, or a faulty transformer. If the problem is with the electrical supply, it will need to be fixed by a qualified electrician before the heater can be used.

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1. Clean or replace the filter

  1. Remove the cover of the filter.
  2. Remove the filter media.
  3. Clean the filter media using a vacuum cleaner and a damp cloth.
  4. Replace the filter media.

2. Check for clogs in the filter housing or pump

  1. Remove the filter housing or pump by unscrewing the four screws located at the base.
  2. Remove the filter and check for clogs. If clogs are found, replace the filter.
  3. Replace the filter housing or pump.
  4. Replace the screws.

3. Replace the filter cartridge

  1. Remove the cover of the filter cartridge.
  2. Check the condition of the filter cartridge and replace it if necessary.
  3. Replace the cover of the filter cartridge.

Still not working? maybe try one of these options:

  1. Clean the strainer basket
  2. Check for leaks in the system
  3. Prime the pump
  4. Check the chemical levels in the pool
  5. Adjust the flow rate