ICP N8MSN0701412A1 furnace Parts

Your Icp furnace model number is printed on the furnace rating plate (data tag) on the cabinet, usually inside the burner/control compartment behind the access door. Turn off power to the furnace before removing panels; then copy the full model number exactly (for example, N8MSN0701412A1).

Where to look on model N8MSN0701412A1

Check these common rating-plate locations:

• Inside the upper front access panel (burner and controls area)
• On an inside cabinet wall near the gas valve and burners
• Near the blower compartment divider or control box area
• Occasionally on the outside of the cabinet side panel

If you are unsure which panel to remove first, follow the access and safety steps in the installation guide.

Safe steps before you open the furnace

We recommend these basics any time you remove an access door:

• Set the thermostat to OFF
• Turn OFF the furnace power at the disconnect or breaker
• Confirm the blower is not running
• Remove the access door carefully (some doors engage a safety switch)
• Reinstall the door fully before restoring power

What to write down (and why)

Record the full identification details from the rating plate so you get the right Furnace parts:

What to record	Example	Why it matters
Model number	N8MSN0701412A1	Matches the correct parts list
Serial number	(varies)	Helps identify production run
Fuel type	Natural gas or propane	Ensures correct gas components

Why it matters

Icp furnaces can look similar across model families, but parts like a control board, igniter, or gas valve are model-specific. Using the exact model number helps you avoid ordering the wrong component and reduces troubleshooting time.

To shop once you have the model number, use the parts list for N8MSN0701412A1 on this page, or search by model at Sears PartsDirect.

Last updated: February 2026

On most gas furnaces (including the Icp N8MSN0701412A1), the most common failure item is the hot surface igniter because it heats to very high temperatures on every call for heat and becomes brittle over time. A dirty filter and airflow problems can also trigger safety shutdowns that look like “no heat.”

What usually fails first (and what it looks like)

• Igniter failure: inducer runs, you may hear a click, but burners never light.
• Flame-sensing issues: burners light briefly, then shut off.
• Limit or pressure switch trips: furnace starts then stops; often tied to airflow or venting problems.
• Door switch open: nothing runs when the access door is not seated.

If you suspect an igniter, the correct model-matched replacement is the furnace burner igniter 1176919. For safety checks and startup sequence details, use the installation guide.

Quick checks we recommend before replacing parts

• Turn off power at the breaker; confirm the access panel is fully closed (door switch must be engaged).
• Replace or clean the air filter; never run without a filter or with the filter door removed.
• Inspect the venting and return air path for blockage; restricted airflow can overheat the furnace and trip the main limit.
• Check wiring connections for tightness and correct polarity; improper polarity can prevent operation.
• If you use a meter, follow safe testing practices (power off when checking continuity).

Common “no heat” parts for this model

Symptom	Likely area	Example part on this page
No ignition, no burner flame	Ignition system	Furnace burner igniter (1176919)
Burners shut down on overheating	Safety limit circuit	Furnace temperature limit switch (1177033)
Furnace dead when door is open/misaligned	Safety interlock	Furnace door switch (1171981)
No gas flow to burners	Gas control	Furnace gas valve (1176929)

Why it matters

Replacing the right part first saves time and prevents repeat shutdowns. Many “failed part” symptoms are actually caused by airflow restrictions (dirty filter, blocked return) that trip safety controls and stop heat.

You can order replacement parts for your Icp N8MSN0701412A1 from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

You typically cannot determine the exact age of an Icp furnace from the model number alone. For Icp model N8MSN0701412A1, the build date is normally identified from the serial number on the furnace rating plate, then matched to Icp’s serial-date format.

Where to find the information you need

Look for the furnace data plate (rating label) and record:

• Serial number (this is the key for age)
• Model number: N8MSN0701412A1
• Input BTU and gas type (helps confirm you are reading the correct label)
• Electrical rating (useful when ordering controls like a circuit board)

For cabinet access and safe panel removal steps, follow the installation guide.

Quick decode guide: model number vs. serial number

Identifier	What it tells you	Best use
Model number (N8MSN0701412A1)	Series, capacity family, configuration	Ordering correct parts and matching specs
Serial number (on rating plate)	Manufacturing date code	Determining furnace age

Why the model number is still useful

Even though it does not reliably give the manufacture date, N8MSN0701412A1 helps us match the right Furnace parts and specs. For example, the installation guide includes size families such as 0701412, which helps confirm cabinet dimensions and filter sizing for that furnace size.

If you are ordering parts while you check the age

Common “age-related” service parts for this model include:

• Furnace temperature limit switch 1177033 (overheat protection)
• Furnace burner igniter 1176919 (no-ignition or intermittent ignition symptoms)
• Furnace door switch 1171981 (furnace dead when door is not fully latched)
• Furnace gas valve 1176929 (gas flow control, diagnosis required)

You can order replacement parts from the parts list for model N8MSN0701412A1, or search by model number on Sears PartsDirect.

Why it matters

Knowing the furnace age helps you plan maintenance and repairs. A typical gas furnace lifespan is 15 to 20 years, and age can also guide whether you focus on ignition, safety switches, airflow, or control-board troubleshooting first.

Last updated: February 2026

On an Icp furnace like model N8MSN0701412A1, the most expensive repair is the heat exchanger because replacement is labor-intensive and directly tied to safe combustion. Other high-cost repairs often include the blower motor, control board, and gas valve (parts plus diagnostic and setup time).

Typical high-cost furnace repairs

These repairs most often create the highest total bill because they combine higher part cost with longer labor time:

• Heat exchanger: major disassembly and reassembly; combustion safety checks required
• Blower motor: higher part cost; setup and airflow verification
• Control board: electrical diagnostics and correct wiring/polarity matter
• Gas valve: gas pressure checks and leak testing are required
• Inducer/pressure-switch related issues: multiple components and venting checks can add time

Model-specific parts you may see involved

Your N8MSN0701412A1 parts list includes components that can be part of higher-cost repairs, depending on the diagnosis:

• Furnace gas valve 1176929
• Board circ 1184594
• Furnace burner igniter 1176919

What drives the total cost (parts vs. labor)

Repair area	Why it gets expensive	What’s typically included
Heat exchanger	Most labor time	Tear-down, reassembly, combustion checks
Air moving (blower/inducer)	Access and setup time	Motor replacement, wheel cleaning, airflow verification
Controls/electrical	Diagnostic time	Testing switches, wiring, board replacement
Gas train	Safety testing	Gas pressure verification, leak test, proper operation checks

Why it matters

The biggest repair bills usually trace back to airflow, venting, or combustion conditions. Keeping filters clean and ensuring the furnace is installed and serviced correctly helps prevent overheating, soot buildup, and repeated safety shutdowns.

For safety and setup details specific to this furnace, follow the cautions and procedures in the installation guide. You can also order model-specific replacement parts from the parts list for N8MSN0701412A1 or search by model on Sears PartsDirect.

Last updated: February 2026

If your Icp N8MSN0701412A1 furnace clicks but does not fire, the control is usually trying to light the burners but is not getting a proven flame signal. The most common causes are gas not reaching the burners, a weak hot surface igniter, a draft proving (pressure switch) problem, or flame-sensing/grounding issues.

What the clicking means on this model

The ignition sequence opens the gas valve and energizes the hot surface igniter. If flame is not proved within about 2 seconds, the control closes the valve and retries up to 3 more times before ignition lockout. Those retries often sound like repeated clicks; see the installation guide.

Safe checks we recommend first

• Set thermostat to HEAT and raise the setpoint 3 to 5 degrees.
• Replace a dirty air filter; confirm supply registers are open.
• Make sure the burner door is fully closed so the door switch is engaged.
• If the furnace is locked out, reset by turning 115V power OFF, then back ON.
• Confirm the manual gas shutoff valve is open.

Likely causes and what to check next

Symptom	Most likely area	What to do next
Clicks, no flame at all	Gas delivery or igniter	Verify gas is on; check if igniter glows
Igniter glows, still no flame	Gas valve not opening	Diagnose valve and wiring; replace if failed
Flame lights then shuts off	Flame proving	Clean flame sensor; verify good grounding
Inducer runs then stops	Draft/pressure switch	Check venting, tubing, pressure switch

Parts that commonly relate to this symptom

• If testing points to a failed valve: furnace gas valve 1176929
• If the igniter does not glow reliably: furnace burner igniter 1176919
• If draft proving fails: sw vent-pr 1183420

Why it matters

A furnace that cannot prove flame will shut the gas valve and may go into lockout, leaving you without heat. Pinpointing whether the failure is ignition, gas delivery, or draft proving helps you replace the correct part the first time.

You can order parts from the parts list for model N8MSN0701412A1, or search by model on Sears PartsDirect.

Last updated: February 2026