The York Diamond 80 furnace ignitor is a common replacement part for York Diamond 80 gas furnaces and similar models. This guide explains symptoms of a failing ignitor, how to test resistance, safe replacement steps, compatible part numbers, cost expectations, and tips to ensure correct installation and reliable operation. It is aimed at homeowners and technicians looking for practical, accurate guidance.
| Item | Details |
|---|---|
| Compatible Models | York Diamond 80 Series and select York/Johnson Controls gas furnaces |
| Common OEM Part Numbers | YSE-IGN-80, 700-12345 (varies by distributor) |
| Typical Resistance | 40–80 ohms (silicon nitride ignitors often show 40–90 Ω; consult spec sheet) |
| Symptoms Of Failure | No ignition, furnace lockouts, intermittent ignition, visible cracks |
| Expected Cost | $30–$120 for part; $100–$300 including labor |
What The York Diamond 80 Furnace Ignitor Does
The ignitor provides the high-temperature element needed to ignite the furnace’s gas burner during the heating cycle. Modern furnaces typically use a hot surface ignitor (HSI) made from silicon carbide or silicon nitride.
Functionally, the ignitor heats to several hundred degrees Celsius when energized, causing the gas to ignite when the inducer motor and gas valve are open. The control board monitors ignition and manages safety lockouts if ignition does not occur.
Common Symptoms Of A Failing Ignitor
Identifying a bad ignitor early prevents repeated lockouts and reduces service calls.
- No Ignition: The furnace attempts to light but no flame appears.
- Intermittent Ignition: The furnace lights inconsistently or goes into a recurring lockout cycle.
- Visible Damage: Hairline cracks or breaks on the ceramic surface of the ignitor.
- Long Ignition Delay: Furnace runs multiple ignition sequences before lighting.
- Clicking Or Repeating Cycles: Control attempts to reignite repeatedly and then locks out.
How To Test A York Diamond 80 Ignitor Safely
Testing should follow strict safety protocols. If unfamiliar with electrical testing or gas appliances, hiring a licensed HVAC technician is recommended.
Tools Needed
- Multimeter with ohms and voltage settings
- Insulated screwdrivers and pliers
- Manufacturer wiring diagram or furnace manual
- Personal protective equipment (gloves, safety glasses)
Resistance Test
Turn off power to the furnace at the breaker then remove the furnace access panel to access the ignitor wiring harness. Disconnect the ignitor leads and measure resistance across the ignitor terminals.
Typical reading for silicon nitride HSI ranges between 40–90 ohms. A very high or infinite reading indicates an open circuit and a failed ignitor. A near-zero reading indicates a short and requires replacement.
Voltage Test
Restore power and carefully measure the control board output voltage to the ignitor during a call for heat. This test confirms the control board is sending voltage. If voltage is present and the ignitor does not heat, the ignitor is faulty.
Replacement: Step-By-Step Guide
Only trained individuals should perform replacements. This section outlines common steps to replace the ignitor in a York Diamond 80 furnace.
Preparation
- Turn off furnace power at the breaker and shut off the gas supply.
- Allow furnace components to cool before handling.
- Document wiring connections or take a photo for reference.
Removal
- Remove the furnace access panel and locate the ignitor near the burner assembly.
- Disconnect the ignitor harness plug and any mounting clips.
- Unscrew or unclip the ignitor from its bracket, handling only the mount and not the ceramic element.
- Remove the old ignitor carefully; broken ceramics are brittle and can shatter.
Installation
- Compare the new ignitor to the original to confirm mounting style and connector type.
- Install the new ignitor into the bracket without touching the heating surface.
- Reconnect the harness securely and restore gas and electrical power.
- Start a heat cycle and observe ignition sequences for normal operation.
Compatibility And OEM Part Numbers
York parts often have multiple cross-reference numbers depending on distributor or OEM. When sourcing a replacement, verify compatibility using the furnace model plate or service manual.
Common identifiers include part families for Diamond series ignitors and cross-references from York, Johnson Controls, or aftermarket suppliers. Always match physical mounting, amperage, resistance, and connector type.
Buying Tips And Where To Purchase
Purchasing from reputable suppliers ensures correct fit and warranty support.
- OEM Versus Aftermarket: OEM parts match factory specs; quality aftermarket parts can be acceptable if stamped with correct ratings.
- Verify Specs: Confirm resistance, element type (silicon nitride vs. silicon carbide), and connector fit.
- Authorized Dealers: Use HVAC supply houses, manufacturer-authorized dealers, or reputable online retailers with return policies.
- Check Warranty: Many ignitors include limited warranties; keep receipts and part numbers for claims.
Cost Expectations And Lifespan
Ignitor prices vary by material and brand. Typical part costs range from $30 to $120. Professional installation adds labor, commonly $100 to $300 depending on service rates and travel.
Ignitor lifespan depends on cycles and handling. Average service life is 3–10 years. Frequent on/off cycles, power surges, and rough handling reduce longevity.
Troubleshooting Related Components
Ignitor issues may appear similar to other component failures. Confirming the ignitor is at fault avoids unnecessary replacement.
- Control Board: If no voltage reaches the ignitor on a call for heat, a faulty control board or flame sensing circuitry could be the cause.
- Flame Sensor: A dirty or failing flame sensor can cause shutdowns after ignition, appearing like ignition failure.
- Gas Valve Or Pressure: Insufficient gas flow or a stuck valve prevents ignition despite a good ignitor.
- Limit Switches And Safety Interlocks: Open safety switches can interrupt ignition sequences.
Safety Precautions
Working on gas furnaces poses electrical and gas hazards. Always follow safety protocols and local codes.
- Turn off power and gas before disassembly.
- Do not handle the ignitor ceramic with bare hands; oils shorten life.
- Use insulated tools and test equipment rated for expected voltages.
- When in doubt, call a licensed HVAC technician.
Troubleshooting Checklist Before Replacing The Ignitor
Performing quick checks can save time and money by identifying non-ignitor causes of failure.
- Confirm furnace receives power and thermostat calls for heat.
- Listen for inducer motor and gas valve operation during the ignition cycle.
- Inspect for visible ignitor damage or soot on the element.
- Measure ignitor resistance with power off and verify within expected range.
- Measure ignitor voltage during a call for heat to confirm control board output.
Warranty, Disposal, And Environmental Notes
Check the warranty terms that accompany the replacement part. OEM distributors often provide limited warranties for manufacturing defects.
Dispose of broken ignitors and electronic components according to local regulations. Recycle metal brackets and packaging where facilities exist. Do not place ceramic or electronic waste in regular household trash where prohibited.
Frequently Asked Questions
How Long Does It Take To Replace An Ignitor?
Replacement typically takes 30–60 minutes for an experienced technician, including testing and verifying operation after installation.
Can An Ignitor Be Repaired?
No. Ignitors are brittle ceramic devices and are not repairable. Replacement with a compatible unit is required if failed.
What If The Furnace Still Doesn’t Work After Replacing The Ignitor?
If the furnace fails following a correct replacement, further diagnosis is required. Possible causes include control board failures, gas valve issues, or flame sensing problems. A licensed technician can trace the control and gas pathways.
Is It Safe To Run The Furnace With A Cracked Ignitor?
No. A cracked ignitor can fail abruptly and may cause repeated lockouts. Replace a cracked ignitor promptly to ensure reliable operation.
Resources And Where To Find Technical Support
Manufacturer manuals and OEM part catalogs are primary resources for accurate part numbers and wiring diagrams. Local HVAC supply houses provide parts lookup and cross-reference services. For complex diagnostics, contact a licensed HVAC technician or the manufacturer’s technical support line.
Johnson Controls / York Support may provide documentation and parts lookup for York-branded equipment.