Tag: furnace
All the articles with the tag "furnace".
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York Furnace Igniter Not Working - Causes & Fix
Usually a cracked igniter or dirty flame sensor causing ignition lockout. Check LED code, inspect igniter for cracks, and clean sensor.
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Lennox Furnace Igniter Not Working - Causes & Fix
Usually a cracked hot surface igniter that can't reach ignition temperature. Also check gas supply, flame sensor, and control board output.
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Rheem Furnace Igniter Not Working - Causes & Fix
Most often the igniter element has cracked or failed open. Test it with a multimeter at the leads for continuity and replace if open.
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Rheem Furnace Not Heating - Causes & Fix
A dirty flame sensor is the most common cause. Clean the sensor rod with fine steel wool or emery cloth and verify the gas valve is open.
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Trane Furnace Igniter Not Working - Causes & Fix
Usually a cracked or failed hot-surface igniter. Less often, bad wiring, a faulty control board, or a gas valve issue prevents ignition.
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Goodman Furnace Igniter Not Working - Causes & Fix
The igniter is likely failed and not glowing when voltage is applied. Verify the igniter receives 115–120 VAC during ignition.
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Carrier Furnace Igniter Not Working - Causes & Fix
The igniter is worn out or has failed. A technician replaces the igniter and verifies the ignition sequence completes normally.
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Boiler vs. Furnace Replacement: Cost, Efficiency, and When to Switch
Boiler replacement costs $4,000–$8,000 vs. furnace $2,200–$5,500. Hydronic vs. forced air comparison, conversion costs, and efficiency pros and cons for Northeast and Midwest homes.
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Furnace Age Guide: When to Repair and When to Replace
Find your furnace age by serial number for Carrier, Trane, Lennox, Rheem, and Goodman. Age-based replacement rules with IRA tax credits for gas furnaces and heat pumps.
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Furnace Blowing Cold Air - 8 Causes and How to Fix Each
Your furnace is running but blowing cold air. Here are 8 causes from thermostat settings to a failed igniter, with step-by-step fixes for each.
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Furnace Won't Ignite - 7 Causes and How to Fix Each
Your furnace is calling for heat but the burner will not light. Here are 7 causes from a bad igniter to a blocked condensate line, with step-by-step fixes.
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Heat Pump vs. Gas Furnace: Total Cost Comparison and Decision Guide
Compare upfront costs, operating costs by region, climate suitability, IRA tax credits, and lifespan for heat pumps vs gas furnaces to make the right HVAC decision.
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Lennox iComfort EFO Error Code — Excessive Flame Out and Common iComfort Faults
Lennox iComfort EFO (Excessive Flame Out) error code explained — causes, step-by-step diagnosis, and fixes for EFO and other common iComfort alert codes.
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Carrier Furnace Error Code 13 — Limit Circuit Lockout Fix
Carrier error code 13 means limit circuit lockout after repeated high-limit trips. It auto-resets after 3 hours. Here's what caused it and how to fix it.
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Carrier Furnace Error Code 31 — Pressure Switch Open Fix
Carrier error code 31 means the pressure switch failed to close. Blocked condensate, cracked hose, or weak inducer. Step-by-step diagnosis and fix.
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Goodman Furnace 4 Flashes — Open High Limit Switch Fix
Goodman furnace 4 slow flashes means the high limit switch is open. Dirty filter causes 80% of cases. Step-by-step diagnosis and fix guide.
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Furnace Filter Size Guide — How to Find the Right Size and MERV Rating
Not sure what furnace filter size you need? This guide shows you how to measure, read the label, understand MERV ratings, and pick the right filter for your system.
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Lennox iComfort Error Code 31 — Pressure Switch Fault Diagnosis and Fix
Lennox iComfort error code 31 means a pressure switch fault. Learn what causes it, how to test the pressure switch and inducer, and which parts to replace.
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Best Furnace Igniter Replacement — Universal and Brand-Specific Picks
Furnace not igniting? Here's how to identify your igniter type, the best universal replacements by brand, and how to swap one in 15 minutes.
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Furnace Repair or Replace? The Decision That Saves You Thousands
Use our age-and-cost rule to decide whether to repair your furnace or replace it. Includes repair cost ranges, red flags that mean replace now, and what a new furnace actually costs.
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Lennox SL280UHV Error Codes — Complete Fault Code Diagnostic Guide
Lennox SL280UHV error codes explained — this two-stage variable-capacity furnace communicates faults via LED blink codes on the control board. Here's how to read and fix each one.
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Lennox EL296V Error Codes — Variable-Speed Furnace Diagnostic Guide
Lennox EL296V error codes: complete fault code reference, LED flash sequence guide, common causes, step-by-step fixes, and OEM parts list for this two-stage variable-speed gas furnace.
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Carrier 58CVA Furnace Error Codes — Fault Code Diagnostic Guide
Complete guide to Carrier 58CVA furnace error codes, LED flash sequences, common fault causes, and step-by-step repair procedures for HVAC technicians.
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Coleman-Evcon Furnace Error Codes — Fault Code Diagnostic Guide
Complete guide to Coleman-Evcon furnace error codes, LED flash sequences, common fault causes, and step-by-step repair procedures for HVAC technicians.