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Factory Authorized Parts™ LH33WP003 Ignition Control Module | Hot Surface Ignition (HSI) | Single-Stage OEM Logic Module

Factory Authorized Parts™ LH33WP003 Ignition Control Module | Hot Surface Ignition (HSI) | Single-Stage OEM Logic Module

Low stock: 1 left

Regular price $713.47 USD
Regular price Sale price $713.47 USD
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Factory Authorized Parts™ - LH33WP003 Ignition Control Module

  • Restore Reliable Ignition: End "no-heat" service calls by replacing a compromised ignition module that fails to power the hot surface ignitor.

  • Precision Flame Monitoring: Eliminates nuisance lockouts caused by an aging control board that can no longer detect the micro-amp flame signal.

  • Simplified Professional Install: Direct OEM replacement matches original mounting footprints exactly—no drilling or wire splicing required.

  • Enhanced Furnace Safety: Microprocessor-controlled gas valve timing ensures the system only operates when safe combustion conditions are met.

  • Durable OEM Build: Engineered specifically for the high-temperature environment of the burner compartment to prevent premature component failure.

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Specifications

Product Details

  • Brand: Factory Authorized Parts™ (Carrier/Bryant/Payne)
  • Manufacturer: Carrier Global Corporation
  • Part #: LH33WP003
  • Weight: 0.55 lbs
  • Voltage: 24 VAC (Control) / 120 VAC (Ignitor Output)
  • Ignition Type: Hot Surface Ignition (HSI)
  • Trial for Ignition: OEM Standard (Multi-try)
  • Flame Sense: Remote or Local Rectification 

description

Factory Authorized Parts™ LH33WP003 Ignition Control Module | Hot Surface Ignition (HSI) | Single-Stage OEM Logic Module

The Factory Authorized Parts™ LH33WP003 serves as the primary "brain" for the combustion sequence of your furnace, functioning as the dedicated controller for safe and reliable ignition. This OEM-focused ignition control module is the specific hardware responsible for managing the 120V power sent to the Hot Surface Ignitor (HSI) and monitoring the flame rectification signal. Specifically engineered for Carrier, Bryant, and Payne gas furnace series, this module ensures the "body" of the burner assembly—the gas valve and ignitor—operates in precise synchronization. By replacing a failed or "non-sparking" module with the LH33WP003, you restore the system's ability to verify a safe burn, preventing gas buildup and ensuring your heating system exits lockout mode to provide consistent home comfort. 

Key Features

  • Genuine OEM Ignition Logic: Specifically programmed to replace part number LH33WP003, maintaining factory-standard warm-up times for carbide and nitride ignitors.
  • Advanced Flame Rectification: High-sensitivity circuitry fixes issues with "short-cycling" where the furnace ignites but shuts down after several seconds due to a weak flame signal.
  • Integrated Safety Lockout: Automatically terminates the gas valve signal if a flame is not detected within the trial-for-ignition period, protecting your property from unburned gas.
  • Microprocessor Diagnostics: Features an onboard LED or diagnostic path that helps identify if system failures are caused by the pressure switch, limit circuit, or the module itself.
  • Plug-and-Play Wiring: Designed with exact-match multi-pin molex connectors to ensure a secure, vibration-resistant electrical connection to the factory harness. 

Product Details

  • Brand: Factory Authorized Parts™ (Carrier/Bryant/Payne)
  • Manufacturer: Carrier Global Corporation
  • Part #: LH33WP003
  • Weight: 0.55 lbs
  • Voltage: 24 VAC (Control) / 120 VAC (Ignitor Output)
  • Ignition Type: Hot Surface Ignition (HSI)
  • Trial for Ignition: OEM Standard (Multi-try)
  • Flame Sense: Remote or Local Rectification 

🛠️ HVAC Depot Pro Tip

Take a Picture First: Before disconnecting the 120V ignitor leads or the low-voltage control plug, photograph the module's orientation. The LH33WP003 is often mounted in tight spaces near the burner tray where wire tension can be an issue. Conduct a diagnostic check by inspecting the porcelain on your Hot Surface Ignitor; if the ignitor is cracked or has a "white spot," it can short out the new module instantly. Always verify your furnace ground is clean and free of rust, as the LH33WP003 requires a solid ground reference to accurately "see" the flame signal through the flame sensor rod. 

Cross-Reference

  • Superseded / Legacy: LH33WP001, LH33WP002, P374-2000
  • Drawing / OEM Equivalents: 1012-920, 1012-83-9201A, 506A-100
  • White-Rodgers/Emerson Equivalents: 50A55-843 (Single-stage equivalent)
  • Brand Equivalents: Carrier, Bryant, Payne, Day & Night, Totaline 

Model Compatibility

  • Carrier 58 Series (Suffixes: 58STA, 58STX, 58WAV, 58PAV, 58MXA, 58MXB)
  • Bryant 300 Series (Suffixes: 310AAV, 310JAV, 311AAV, 311JAV, 340MAV, 350MAV)
  • Payne PG8/PG9 Series (Suffixes: PG8MAA, PG8JAA, PG9MAA, PG9MAB)
  • Horizontal Units (Suffixes: 395CAV, 373LAV, 376CAV, 383KAV)

 

Specification

Refund policy

Our refund and returns policy lasts 30 days. If 30 days have passed since your purchase, we can’t offer you a full refund or exchange. Please note there will be a 20% Re-stocking fee of product price.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Model and serial number must match what is on the invoice and correct box information.
Exclusions:
•    Part with obvious signs of use of installation.
•    Original box was destroyed or could not be located by purchaser.
•    Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
•    Any item that is returned more than 30 days after delivery
Part installation
HVAC Parts and Equipment Depot recommend this parts will be installed by a licensed professional contractor. HVAC Parts and Equipment Depot assumes no liability for any injuries or damages arising from the user information or products. 
Sale items
Only regular priced items may be refunded. Sale items cannot be refunded. Special Order items cannot be refunded. 
Exchanges
We only replace items if they are defective or damaged from Manufactory. If you need to exchange it for the same item, send us an email at hvacpartsstore@gmail.com and send your item to: HVAC Parts & Equipment Depot 1135 E Plano Parkway Suite 8 Plano Tx 75189.
Refunds
To complete your return, we require a receipt or proof of purchase within 30 days or less.
Once your return is received and inspected by management team, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 7-14 Business days. HVAC Parts and Equipment Depot or its employees are not responsible for damaged items from manufactory.
Shipping returns
To return your product, you should mail your product to:
HVAC Parts & Equipment Depot
1135 E Plano Parkway Suite 8 Plano Tx 75074.
Customer will be responsible for paying for shipping. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you may vary.
If you are returning more expensive items, you may consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item without a valid tracking number provided by your choice of delivery method.
Late or missing refunds
If you haven’t received a refund yet, first check your bank account again. This process takes approximately 7-14 business days depending on your Bank.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at hvacpartsstore@gmail.com
Special Orders
Special orders should be picked up within 30 Days of purchase day. Your items will be considered abandoned and will be returned to manufacturer. There will be a 100% Re-stocking fee for abandoned items. 

Need help?
Contact us via email hvacpartsstore@gmail.com or Phone 214-734-5222 for questions related to refunds and returns.
Thank you for choosing HVAC Parts & Equipment Depot.

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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