What is the most common part to fail on a furnace?
On most gas furnaces (including Icp model NTC6075FBG1), the most common failure item is the ignition component because it heats and cools every time the furnace starts. When it fails, the burners will not light, so you get a no-heat condition.
Most common furnace failures (and what you’ll notice)
These parts fail often because they cycle frequently, run hot, or protect the furnace from unsafe temperatures.
- Igniter or pilot igniter/sensor: furnace runs but will not light burners, or lights then shuts off
- Limit switch: burners shut off early, short cycling, or blower runs longer than normal
- Control board or fan control relay: blower or burners behave erratically, intermittent heat
- Blower motor or blower assembly: weak airflow, overheating, loud humming, or no air from vents
- Run capacitor (if used): blower struggles to start, slow ramp-up, motor overheating
Parts on this NTC6075FBG1 page that match those common failures
If you’re troubleshooting a no-heat or short-cycling problem, these model-listed parts are the most relevant starting points:
| Symptom | Common suspect | Example part on this model page |
|---|---|---|
| No ignition / no flame | Ignition component | Furnace pilot igniter and sensor 1009524 |
| Burners shut off quickly | High-limit safety | Limit switch 1013102 or limit switch 1013105 |
| Blower issues / overheating | Air mover components | Furnace blower fan motor 1012514 or furnace blower assembly 1013833 |
Why it matters
The “most common” failure is usually the part that cycles the hardest. Ignition parts and safety switches are designed to stop heat when something is unsafe; replacing the correct failed part restores reliable ignition, steady burner operation, and proper airflow.
Ordering the right replacement
To avoid mismatches, we recommend matching by model number NTC6075FBG1 and the exact part listing.
- Confirm the symptom (no ignition, short cycling, no airflow)
- Compare the part name and ID to your furnace’s existing component
- Order directly from the parts list for this model, or search by model on Sears PartsDirect
Last updated: February 2026
What is the most expensive part to fix on a furnace?
On an Icp NTC6075FBG1 furnace, the most expensive repair is usually a major air-moving or control component, most often the blower motor or blower assembly. In our parts list for this model, the higher-cost items include the furnace blower fan motor 1012514 and the furnace blower assembly 1013833.
Most expensive furnace repairs (typical)
These are the repairs that most often drive the highest total cost (part plus labor):
- Heat exchanger: typically the single most expensive component when it fails
- Blower motor or blower assembly: common high-cost repair when bearings seize or windings fail
- Control board: expensive when relays or internal circuits fail
- Ignition components: can be costly depending on design and availability
- Gas valve: higher cost and requires careful setup and testing
What we see on the NTC6075FBG1 parts list
Below is a quick comparison of some of the higher-priced parts available for this model.
| Part (NTC6075FBG1) | What it does | When it’s suspected |
|---|---|---|
| Furnace blower fan motor 1012514 | Spins the indoor blower to move heated air | Hums but won’t start, overheats, squeals, trips on limit |
| Furnace blower assembly 1013833 | Complete blower package (motor plus housing/wheel depending on design) | Severe vibration, damaged wheel, repeated motor failures |
| Board 1170063 | Controls fan timing/relay functions | Blower runs at wrong times, won’t energize, intermittent operation |
| Igniter 1149856 | Lights the burners | No ignition, repeated ignition attempts |
Quick checks that help confirm the “big-ticket” part
Turn off power to the furnace at the breaker before inspecting anything.
- Listen for motor symptoms: squeal, grinding, or a loud hum with no airflow
- Check for weak airflow at multiple registers (can point to blower issues, but also duct/filter)
- Watch the heat cycle: short cycling and overheating often ties back to airflow problems
- Look for burner ignition failures (points toward igniter or sensor issues)
- If you’re testing electrical parts, use a meter correctly; see how to use a multimeter to test electrical parts video
Why it matters
The “most expensive” furnace repair is often expensive because it affects safety, reliability, and comfort. A failing blower motor can cause overheating and limit trips, while a failing control board can create intermittent, hard-to-diagnose problems.
You can order replacement parts for your Icp NTC6075FBG1 from the parts list for this model, or search by model number on Sears PartsDirect.
Last updated: February 2026
What is the cost to replace a furnace part?
For an Icp NTC6075FBG1 furnace, the cost to replace a part is the price of the replacement part plus labor (if you hire service). On this model, common parts range from about $20 for a limit switch to over $400 for a blower motor, depending on what failed.
Typical part price ranges for this model
Below are examples of replacement part prices we commonly see for the NTC6075FBG1 (parts only). Labor, diagnostic fees, and any additional materials are separate.
| Part type (example) | What it affects | Typical parts cost on this model |
|---|---|---|
| Limit switch | Safety shutoff, overheating protection | $20 to $25 |
| Run capacitor | Blower motor starting/running | Around $30 |
| Blower assembly | Whole air-moving assembly | Around $300 |
| Blower fan wheel | Airflow, noise, vibration | Around $170 |
| Blower fan motor | Airflow, no-heat due to no circulation | Around $430 |
| Igniter | Ignition reliability, no-heat | $200 to $465 |
What else changes the total cost
Even when the part price is known, the total replacement cost changes based on the job and what we find during diagnosis.
- Service call and diagnosis: many repairs start with a diagnostic visit.
- Access and disassembly time: blower and control repairs typically take longer than a switch.
- Related parts: a failed motor can also require a capacitor, wheel, or gasket.
- Electrical troubleshooting: verifying voltage, safeties, and control signals adds time.
- After-repair setup: confirming proper ignition sequence and safe operation.
Quick examples using parts from this page
These examples show how widely costs can vary just from the part choice.
- Low-cost repair example: replace a safety switch such as the limit switch 1013102.
- Higher-cost repair example: replace the furnace blower fan motor 1012514 (often paired with checking the capacitor and wheel).
Why it matters
Furnace parts are tied to safety circuits (limit switches), ignition (igniter), and airflow (blower motor and wheel). Getting the correct part for the Icp NTC6075FBG1 prevents repeat failures, nuisance shutdowns, and overheating.
Ordering the right part
We recommend matching by model number (NTC6075FBG1) first, then confirming the part name and ID from the parts list for your furnace. You can also search by model number on Sears PartsDirect if you are comparing parts across similar Icp furnaces.
Last updated: February 2026
