free owners manual for a intertherm furnace feh

The Intertherm FEH furnace is a high-efficiency gas furnace designed for residential heating applications. This furnace features advanced combustion technology, multiple safety systems, variable-speed blower motor, electronic ignition, and energy-efficient operation. Below are key sections covering safety guidelines, operational features, installation requirements, maintenance procedures, troubleshooting, and technical specifications.

1. Safety Information 2. Product Overview 3. Installation Guidelines 4. Operating Instructions 5. Maintenance Schedule 6. Technical Specifications 7. Control System 8. Troubleshooting Guide 9. Warranty Information 10. Contact Support

Safety Information

Critical safety warnings and precautions for proper furnace operation.

Warning Type	Description
Gas Leaks	If you smell gas, immediately evacuate and contact gas company
Carbon Monoxide	Install CO detectors near sleeping areas
Electrical Safety	Disconnect power before servicing
Combustion Air	Ensure adequate ventilation for proper combustion
Hot Surfaces	Burners and heat exchanger become extremely hot during operation

Product Overview

Key components and features of the Intertherm FEH furnace.

Heat Exchanger: Stainless steel construction for durability and efficiency
Blower Assembly: Variable-speed ECM motor for quiet operation
Gas Valve: Precision control for optimal fuel consumption
Ignition System: Hot surface igniter for reliable starts
Control Board: Microprocessor-based for advanced diagnostics
Air Filter: High-efficiency particulate air (HEPA) compatible

WARNING! Only qualified HVAC technicians should perform installation and major repairs.

Installation Guidelines

Proper installation requirements and procedures.

Location: Install in well-ventilated area with adequate clearance
Venting: Follow local codes for proper vent pipe installation
Gas Connection: Use approved pipe compound and leak test all connections
Electrical: Connect to dedicated 120V circuit with proper grounding
Ductwork: Ensure proper sizing and sealing for optimal airflow
Combustion Air: Verify adequate air supply for safe operation

CAUTION! Improper installation may create fire hazard or carbon monoxide risk.

Operating Instructions

Thermostat Settings: Programmable thermostat recommended for energy savings
Startup Sequence: Control board performs self-check before ignition
Normal Operation: Green LED indicates proper furnace operation
Shutdown Procedure: Follow proper sequence for seasonal shutdown
Emergency Shutoff: Locate and familiarize with emergency gas shutoff valve

Maintenance Schedule

Regular maintenance requirements for optimal performance.

Maintenance Task	Frequency	Description
Filter Replacement	Monthly	Replace or clean air filter
Blower Cleaning	Annual	Clean blower assembly and motor
Heat Exchanger Inspection	Annual	Check for cracks or damage
Burner Cleaning	Annual	Clean burners and inspect flame pattern
Vent System Inspection	Annual	Check for obstructions or damage

Technical Specifications

Model: Intertherm FEH Series
Fuel Type: Natural Gas or Propane
Input BTU: 40,000 - 120,000 BTU/hr
Efficiency: 80% - 96% AFUE
Electrical: 120V, 60Hz, 15A circuit
Gas Pressure: Natural Gas: 3.5" WC, Propane: 11" WC
Dimensions: Varies by model (typically 21"W x 26"D x 56"H)
Weight: 120-180 lbs depending on model

Control System

Understanding the furnace control board and diagnostic indicators.

LED Status Codes: Flashing patterns indicate system status and error conditions

Thermostat Connections: Standard 5-wire connection (R, W, Y, G, C)

Safety Switches: Rollout switches, pressure switches, and limit switches

Diagnostic Mode: Access through control board for system testing

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power loss, thermostat issue	Check circuit breaker, verify thermostat settings
No heat	Gas valve closed, igniter failure	Verify gas supply, check igniter operation
Short cycling	Dirty filter, blocked vent	Replace filter, check vent system
Blower not running	Motor failure, control board issue	Check motor capacitor, verify control signals
Unusual noises	Loose components, airflow restriction	Tighten mounting hardware, check ductwork

Warranty Information

Limited warranty coverage for Intertherm FEH furnace components.

Heat Exchanger: 20-year limited warranty
Parts: 5-year limited warranty
Labor: 1-year limited warranty
Registration: Complete warranty registration within 90 days of installation

Contact Support

For technical assistance, parts, or service information:

Customer Service: 1-800-INTERTHERM (1-800-468-3784)

Website: www.intertherm.com/support

Emergency Service: Contact local authorized Intertherm dealer

Parts Ordering: Available through authorized distributors