ICP NUG5075BFB1 gas fan assisted combustion furnace Parts

The most common repairs on an Icp gas fan assisted combustion furnace like model NUG5075BFB1 involve airflow problems (filter and blower issues), ignition or pilot problems, and safety or control failures such as a limit switch or fan control. Many fixes start with basic checks, then move to testing and part replacement.

Most common repairs we see (and what they affect)

• Airflow restrictions: dirty filter, blocked return vents, or a dirty blower wheel can cause overheating and short cycling.
• Blower problems: a weak motor, worn wheel, or failed run capacitor can prevent proper air movement.
• Ignition or pilot issues: pilot burner problems can stop the furnace from lighting reliably.
• Safety shutdowns: a tripped or failing limit switch can shut the burners off to prevent overheating.
• Control timing issues: a failing fan timer can cause the blower to run at the wrong time or not at all.
• Electrical faults: loose connections, damaged wires, or a bad switch can interrupt operation.

Parts commonly involved on NUG5075BFB1

If troubleshooting points to a failed component, these are common repair parts listed for this model:

Symptom	Common suspect part	What it does
Blower will not start or hums	Cap df .mf v 12907	Helps the blower motor start and run properly
Furnace overheats or cycles off quickly	Limit switch 1013102	Shuts burners down if temperature gets too high
Weak airflow or loud vibration	Furnace blower fan wheel 600587	Moves air through the duct system
Blower timing seems wrong	Fan timer 1170063	Controls blower on/off timing
No heat due to lighting problems	Pilot burner 1149944	Provides pilot flame for ignition

Quick checks before replacing parts

• Replace the air filter and confirm all supply and return vents are open.
• Listen for the blower: no start, humming, scraping, or rattling helps narrow the cause.
• Check the thermostat settings and batteries (if applicable).
• Inspect wiring for loose spade connectors or heat damage.
• If you test electrical parts, shut off power at the furnace switch and breaker first.

Why it matters

Furnaces often fail from airflow and safety-related issues first. Fixing the root cause (like restricted airflow) prevents repeat shutdowns and protects major components such as the blower assembly and burner system.

Last updated: February 2026

The most expensive furnace repair is typically replacing the heat exchanger because it is a major, labor-intensive component and often drives total repair costs into the four-figure range. On an Icp gas fan assisted combustion furnace like model NUG5075BFB1, other high-cost repairs commonly involve the blower and key safety controls.

Most expensive furnace repairs (typical)

These repairs usually cost the most because the parts are major assemblies and the labor time is high.

• Heat exchanger replacement (often the costliest single repair)
• Blower assembly or blower motor replacement
• Control board or ignition control replacement
• Draft inducer assembly replacement
• Gas valve replacement

What that means for Icp model NUG5075BFB1

For this model, the priciest parts we commonly see customers replace are the air-moving and control components, such as the furnace blower assembly 1013833. If the blower wheel is damaged or out of balance, the furnace blower fan wheel 600587 can also be a significant parts cost.

Common symptoms that point to a “big-ticket” repair

• Furnace runs but no airflow from registers (blower issue)
• Loud rumbling, scraping, or vibration during heat (blower wheel or blower issue)
• Furnace starts then shuts down quickly (limit or control issue)
• Blower runs at the wrong time or not at all (fan control/timer issue)

Quick cost comparison (parts vs. labor)

Actual totals vary by access, venting, and diagnostics time, but this is the usual pattern.

Repair type	Parts cost trend	Labor time trend
Heat exchanger	High	High
Blower assembly	Medium to high	Medium
Electrical controls	Medium	Low to medium

Why it matters

The most expensive furnace repairs are usually the ones tied to core heating or airflow. Catching problems early (overheating, abnormal blower noise, frequent cycling) can prevent secondary damage to components like the limit switch and blower.

Last updated: February 2026

For your Icp NUG5075BFB1 gas fan assisted combustion furnace, the best spare parts to keep on hand are the ones that commonly stop heating or stop the blower from running. We recommend prioritizing a run capacitor, a limit switch, and key blower components that match your exact model.

Recommended spares for the NUG5075BFB1

These are practical “keep-on-hand” parts because they are common failure points and can cause a no-heat or no-airflow complaint:

• Cap df .mf v 12907 (motor run capacitor)
• Limit switch 1013102 (overheat safety switch)
• Furnace blower assembly 1013833 (complete blower motor assembly)
• Furnace blower fan wheel 600587 (blower wheel that moves air)
• Fan timer 1170063 (fan control relay/timer)

What each spare helps you fix

Symptom	Likely area	Spare to consider
Blower hums but will not start	Blower motor circuit	Motor run capacitor
Furnace starts then shuts down quickly	Overheat protection	Limit switch
Weak airflow, rattling, or vibration	Air-moving components	Blower fan wheel or blower assembly
Blower runs at the wrong time or not at all	Fan control	Fan timer

How to choose what to stock first

We suggest stocking based on your home’s risk and downtime tolerance:

• If you need the fastest “back in heat” fix, start with the capacitor and limit switch.
• If the furnace is older or has a noisy blower, add the blower wheel next.
• If you have recurring fan control issues, add the fan timer.
• If you want the most complete airflow backup, keep the blower assembly (higher cost, bigger storage).

Why it matters

A furnace can fail from a small electrical part just as easily as a major component. Keeping a few model-correct spares for the NUG5075BFB1 reduces downtime, especially during cold weather, and helps you avoid repeated diagnostic delays.

Last updated: February 2026