Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsIf your Tempstar furnace will not start, is blowing cool air, or is showing a blinking light, begin with simple checks: thermostat settings, airflow, power, and the model-specific status-code legend. Tempstar furnaces differ by series and model, so do not treat a blink-code chart or repair procedure as universal. Find the furnace model number and follow its owner’s manual and the instructions on the unit.
Start with checks that do not require opening the furnace
An older ICP/Tempstar owner’s manual recommends checking airflow and basic controls before requesting service. These are general checks only; follow the documentation for your installed model if it differs.
- Thermostat: If the furnace is not operating, confirm it is set to HEAT and its temperature setting is above the room temperature.
- Air filter: Check whether the filter is dirty. If it needs replacement, use the size and specification required by the installed filter or furnace documentation; the correct size and rating are model-dependent.
- Supply and return grilles: Make sure they are open and not blocked.
- Power: Check that the furnace’s electrical power switch is on and that its circuit breaker has not tripped.
- Access door: Check only that the blower access door is firmly in place. Do not remove panels to troubleshoot.
These checks are drawn from an older manual excerpt, not a universal procedure for every Tempstar furnace. Consult the ICP/Tempstar owner’s manual excerpt alongside the manual for your exact model.
If the furnace will not turn on
Check the thermostat, switch, breaker, airflow, and door seating listed above. If those checks do not resolve the problem, use the manual for your model or contact the company that services the furnace. Do not infer that an internal component has failed based on a no-start symptom alone.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →#1 Best Overall
- UNIVERSAL COMPATIBILITY: Fits most standard residential and commercial HVAC systems with a standard 1-inch filter. Including Carrier, Bryant, Payne & Honeywell. Actual size 15.75 x 24.75 x 0.75 Comparable to Filtrete MPR 600 and Honeywell FPR 5 filters.
- DEPENDABLE MERV 8 (MPR 600 / FPR 5) FILTRATION: Captures up to 90% of airborne particles such as dust, lint, pollen, pet hair, and mold spores to help keep your home’s air cleaner and fresher every day.
- ENHANCED AIRFLOW & EFFICIENCY: Electrostatically charged pleated media traps more particles while allowing smooth air flow. Reducing strain on your HVAC system for consistent performance and energy savings.
- LONG-LASTING, DURABLE DESIGN: Heavy-duty beverage board frame with moisture-resistant backing and reinforced pleats provides up to 3 months of reliable filtration. Outlasting traditional fiberglass filters.
- PROUDLY MADE IN THE USA: Manufactured using high-quality materials in American facilities to ensure dependable performance, sustainable production, and cleaner indoor air you can trust.
If you suspect a gas-supply interruption, do not adjust gas valves, attempt to relight equipment, or open the furnace based on general online instructions. The older manual discusses checking whether gas was shut off for safety reasons, but the correct procedure depends on the installed model. Follow its exact manufacturer instructions or contact a qualified HVAC professional.
If the furnace is blowing cool air
Inspect the filter and make sure supply and return grilles are open and unobstructed. A dirty filter or blocked grille can be relevant to airflow, but these observations do not establish the cause of cool air. If basic checks do not help, consult the model’s manual or call the servicing dealer rather than attempting internal diagnosis.
Rank #2
- REPLACEMENT FOR NORDYNE 917763: Designed to replace Nordyne 917763 A-coil filters in compatible furnace and HVAC systems. Verify the 917763 part number and 16 x 19 x 1/8-inch dimensions before ordering to help ensure the correct fit.
- ALUMINUM MESH CONSTRUCTION: Built with a durable aluminum frame and mesh media for compatible furnace and HVAC applications. The rigid metal construction provides a reusable alternative to disposable filter designs.
- WASHABLE & REUSABLE: Clean and reuse the aluminum mesh filter instead of replacing it after each use. Rinse with a gentle spray, use a mild soapy solution when additional cleaning is needed, and allow the filter to dry before reinstalling.
- 2-PACK REPLACEMENT SET: Includes two 16 x 19 x 1/8-inch aluminum mesh filters designed as replacements for Nordyne 917763 A-coil filters, combining the required fitment with a washable, reusable filter design.
- MADE IN USA: Made in the USA with durable aluminum construction for long-term use in compatible furnace and HVAC systems, providing a reusable replacement option for applications requiring the Nordyne 917763 filter.
What a blinking status light means
There is no single Tempstar blink-code chart that applies to every furnace. The meaning depends on the exact model and its controls. Find the model number, then use that unit’s manual and service label or code legend.
If a status code is visible, record it before opening the blower access door or interrupting power. The older ICP/Tempstar manual gives this instruction: “NOTE: Record the LED status code BEFORE removing the blower access door or turning off 220-V power to the furnace.” The quoted voltage is specific to that manual and must not be assumed for every Tempstar model. Its code legend is described as being in the information booklet inside the main furnace door; use the location and instructions documented for your own unit.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Why model identification matters
Tempstar’s catalog groups gas furnaces into Ion, QuietComfort, and Performance series. Models vary in features and controls, so a symptom or light pattern cannot identify a failed part by itself. Check Tempstar’s gas-furnace catalog and locate the documentation for your model.
For example, Tempstar describes the F97CMN as an Ion 98 variable-speed modulating furnace, with a silicon nitride ignitor, high-temperature limit control, and compatibility with the Ion Black System Control. The N80MSN is described as a Performance 80 single-stage furnace, also listing a silicon nitride hot-surface igniter and high-temperature limit control. These are product-specific details, not instructions for diagnosing or repairing other models.
Rank #4
- WHOLE HOUSE REPLACEMENT: 20x25x5 air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 19.88" x 24.75" x 4.38")
- MERV 8 PERFORMANCE: Protect your home or business from pollen, lint, mold, and more with MERV 8 synthetic media (comparable with MPR 700 & FPR 5) that captures 90% of dust without restricting air flow
- LONG-LASTING FILTRATION: Electrostatically charged media (made in the USA) with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 180 days for optimal performance)
- SUPERIOR CONSTRUCTION: Easy installation beverage board (recyclable) frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
- COMPATIBLE MODELS: Honeywell / Air Demon Filter Part Numbers F25 (#203720), F35 / F35R (#FC35A1027), F100 / F150 (#FC100A1037), F200 (#FC200E1037), Bryant (FILBBCAR0020, FILXXCAR0020, FILXXCAR0120), Carrier (CARF8250602, CARFC100A1037, CARL86469, EXPXXFIL0020, EXPXXLMC0020, EXPXXUNV0020, FILCCCAR0020, FILXXCAR-0020, FILXXCAR0120), Day & Night (MACPAK20), Lennox (X8790, X0586, X5426, X6661, X6673, X7751, BMAC-20C, HCC20-28, HCF20-10, HCF20-16), Payne (MACPAK20)
- Model number and series: Use these to find the matching manual and service information.
- Ignition and controls: Features differ among products; do not assume a procedure or code interpretation transfers between models.
- SmartSense: Remote dealer review of performance data, including fault codes, is available only on supported equipment and with the homeowner’s data-sharing and remote-access permission. Tempstar says it pairs with a SmartSense-enabled Ion Gray Smart Thermostat. See Tempstar SmartSense details.
When to stop troubleshooting and call for service
Call the servicing dealer if the model’s basic checks do not solve the problem, the code legend points to a service issue, or you are unsure what a check requires. Do not try to diagnose ignition, flame-sensing, gas-valve, pressure-switch, or safety-control failures from a brand-level article.
The older ICP/Tempstar manual says a rollout switch may shut down the furnace after a high-temperature condition. If a rollout switch trips a second time, it directs the reader to turn off the furnace and call for service. Do not reset or bypass a safety switch. Tempstar advises customers seeking purchase or installation help to use its Dealer Locator to find an expert in their area.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
