E-301: Low water level trip

Q: How do I check a E-301 fault?

1. Do not add water to a hot dry boiler — call a competent person 2. Check gauge glass and feed pump 3. Test level controls per site procedure Safety: Boiler work must follow site permit-to-work; never bypass safety controls.

Probable causes

Feed pump failure
Level control fault
Excess blowdown
Steam demand surge

Step-by-step checks

Do not add water to a hot dry boiler — call a competent person
Check gauge glass and feed pump
Test level controls per site procedure

Safety: Boiler work must follow site permit-to-work; never bypass safety controls.

Sample code — verify with the OEM manual for your exact model.

Ask the expert on WhatsApp

Frequently asked questions

What does E-301 mean on a Steam Boiler?

E-301 usually indicates: Low water level trip. Confirm the meaning in the manufacturer's manual for your model.

What causes E-301?

Feed pump failure; Level control fault; Excess blowdown; Steam demand surge.

How do I check a E-301 fault?

Work through the numbered checks above in order, recording readings as you go. Boiler work must follow site permit-to-work; never bypass safety controls.

Other Steam Boiler codes

Disclaimer: Fault code information is guidance only. Codes and meanings vary between manufacturers and models — always follow the manufacturer's manual and your site's safety procedures, and use qualified personnel for electrical, pressure, refrigerant and combustion work.