Heater displays E14; unit may start but then shuts down intermittently.

Safety first: Turn off power at the breaker before opening the electrical junction box. Only work on live circuits if you are qualified.

• Check supply voltage: Measure voltage at the Kripsol heater input terminals with a multimeter. It should match the nameplate rating within ±10%.
• Inspect connections: Tighten all line, neutral, and ground screws at the heater terminal block. Look for signs of overheating or discoloration.
• Assess cable size: Verify that the supply cable gauge is appropriate for the heater’s current draw and distance. Undersized cables can cause voltage drop and E14 errors.
• Internal transformer: If the main supply is stable but the control board still reports low voltage, the internal Kripsol control transformer may be faulty and require replacement.
• Professional evaluation: Persistent E14 should be evaluated by an electrician or authorized Kripsol service center.