⚡Inverter Generator

E18

Westinghouse · iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start

Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start E18 Error Fix: Diode Failure in Rectifier Circuit

One or more diodes in the rectifier circuit have failed, causing erratic DC voltage output and affecting generator performance. This may lead to failure to start or unstable operation.

High severity2 fixes available

Quick Answer

Error E18 on the Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start means: Diode Failure in Rectifier Circuit. The top-ranked community fix is “Test and Replace Faulty Diodes” (medium difficulty, ~50 min, DIY cost: $25-$40). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · inverter generator

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

Root Cause Analysis

Electrical Fault → Diode FailedPrimary

When to Call a Professional

While many inverter generator repairs can be done safely at home, consider hiring a qualified technician if:

This is a high severity error — continued use may cause damage or a safety hazard
The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $140-$190.

Other Westinghouse Models with Error E18

iGen2200 Inverter 1,800 Running Watts / 2,200 Peak Watts Portable Inverter Generator with Quiet Operation

inverter_generator · 2 fixes

iGen4500DF Dual Fuel Inv

inverter_generator · 2 fixes

WGen12000DF Heavy Duty 12,000 Starting Watts / 9,500 Running Watts Dual Fuel Portable Generator with Electric Start

portable_generator · 2 fixes

WGen3600v Economy 3,600 Starting Watts / 3,000 Running Watts Portable Generator with Economy Mode

portable_generator · 2 fixes

WGen5300DFv Dual Fuel 5,300 Starting Watts / 4,250 Running Watts Dual Fuel Portable Generator with Electric Start

portable_generator · 2 fixes

WGen7500 Portable 7,500 Starting Watts / 6,000 Running Watts Portable Generator with Electric Start and Wheel Kit

portable_generator · 2 fixes

WGen9500DF 9,500 Watt Dual Fuel Portable Generator with 420cc Engine and Electric Start

portable_generator · 2 fixes

WH15000EC 15 kW Home Backup Standby Generator with Automatic Transfer Switch Ready

standby_generator · 2 fixes

Other Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start Error Codes

E02

Low Oil Pressure Warning

2 fixes

E03

Overload Protection Engaged

2 fixes

E04

Engine Overheat Detected

2 fixes

E05

Fuel System Malfunction

2 fixes

E06

Battery Charging Failure

2 fixes

E07

Starter Motor Failure

2 fixes

E08

Control Board Communication Error

2 fixes

E09

Fuel Tank Cap Sensor Fault

2 fixes

People Also Ask About Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start Error E18

What does error code E18 mean on a Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start?

Error code E18 on the Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start means: Diode Failure in Rectifier Circuit. One or more diodes in the rectifier circuit have failed, causing erratic DC voltage output and affecting generator performance. This may lead to failure to start or unstable operation.

How do I fix error code E18 on my Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start?

The most successful fix is "Test and Replace Faulty Diodes" (medium difficulty, ~50 minutes). Estimated DIY cost: $25-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code E18 on a Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start error E18 myself?

Yes — the top-ranked community fix ("Test and Replace Faulty Diodes") is rated medium difficulty and takes about 50 minutes. Tools needed: Phillips screwdriver, Multimeter, Soldering iron.

How much does it cost to repair Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start error E18?

DIY cost: $25-$40. Professional repair typically costs $140-$190. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start have?

The Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start has 8 other known error codes, including: E02 (Low Oil Pressure Warning), E03 (Overload Protection Engaged), E04 (Engine Overheat Detected), E05 (Fuel System Malfunction), E06 (Battery Charging Failure), and 3 more.

Which other Westinghouse models have the E18 error?

Error code E18 also appears on 8 other Westinghouse models: iGen2200 Inverter 1,800 Running Watts / 2,200 Peak Watts Portable Inverter Generator with Quiet Operation, iGen4500DF Dual Fuel Inv, WGen12000DF Heavy Duty 12,000 Starting Watts / 9,500 Running Watts Dual Fuel Portable Generator with Electric Start, WGen3600v Economy 3,600 Starting Watts / 3,000 Running Watts Portable Generator with Economy Mode, WGen5300DFv Dual Fuel 5,300 Starting Watts / 4,250 Running Watts Dual Fuel Portable Generator with Electric Start, WGen7500 Portable 7,500 Starting Watts / 6,000 Running Watts Portable Generator with Electric Start and Wheel Kit, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start have?

The Westinghouse iGen4500 Inverter 3,700 Running Watts / 4,500 Peak Watts Portable Inverter Generator with Remote Start has 8 other known error codes:

E02 — Low Oil Pressure Warning (2 fixes)
E03 — Overload Protection Engaged (2 fixes)
E04 — Engine Overheat Detected (2 fixes)
E05 — Fuel System Malfunction (2 fixes)
E06 — Battery Charging Failure (2 fixes)
E07 — Starter Motor Failure (2 fixes)
E08 — Control Board Communication Error (2 fixes)
E09 — Fuel Tank Cap Sensor Fault (2 fixes)

Which other Westinghouse models have the E18 error?

Error code E18 also appears on 8 other Westinghouse models:

iGen2200 Inverter 1,800 Running Watts / 2,200 Peak Watts Portable Inverter Generator with Quiet Operation (inverter generator) · 2 fixes
iGen4500DF Dual Fuel Inv (inverter generator) · 2 fixes
WGen12000DF Heavy Duty 12,000 Starting Watts / 9,500 Running Watts Dual Fuel Portable Generator with Electric Start (portable generator) · 2 fixes
WGen3600v Economy 3,600 Starting Watts / 3,000 Running Watts Portable Generator with Economy Mode (portable generator) · 2 fixes
WGen5300DFv Dual Fuel 5,300 Starting Watts / 4,250 Running Watts Dual Fuel Portable Generator with Electric Start (portable generator) · 2 fixes
WGen7500 Portable 7,500 Starting Watts / 6,000 Running Watts Portable Generator with Electric Start and Wheel Kit (portable generator) · 2 fixes
WGen9500DF 9,500 Watt Dual Fuel Portable Generator with 420cc Engine and Electric Start (portable generator) · 2 fixes
WH15000EC 15 kW Home Backup Standby Generator with Automatic Transfer Switch Ready (standby generator) · 2 fixes

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