OEM Suburban 520820 RV Furnace 521099 12V DC 3G Heater Fan Control Ignition Circuit Board Replaces Suburban 520820 (WILL NOT WORK on NT-45S model. **Will not replace 24VAC model boards.**) Fits Models 1 Suburban SF-30 Suburban NT-40 Suburban SF-42 Fits Models 2 Suburban P-40 Series Suburban NT-24 Suburban SF-35 Cross Reference (see description): Fits multiple Suburban furnace models Fits Models 3 Suburban SF-35F Suburban NT-30S Suburban NT-35K NT-20S Fits Models 4 SF30 NT40 SF42 P40 NT24 SF35 SF35F NT30S NT35K NT20S Compatible with Suburban Furnaces: DD-17-DSI NT-12EF, NT-12F, NT-12FC, NT-12L, NT-12LE, NT-12MEF, NT-12S, NT-12SE, NT-16EF, NT-16F, NT-16FC, NT-16L, NT-16LE, NT-16MEF, NT-16S, NT-16SE, NT-16SEQ, NT-16SQ, NT-20L, NT-20LE, NT-20S, NT-20SE, NT-20SEQ, NT-20SQ, NT-20T, NT-24M, NT-24S, NT-24SP, NT-25K, NT-30K, NT-30M, NT-30S, NT-30SP, NT-34S, NT-34SP, NT-35K, NT-40, NT-42S, NT-42T, SF-20, SF-20F, SF-20FQ, SF-20Q, SF-25, SF-25F, SF-25FQ, SF-25Q, SF-30, SF-30F, SF-30FQ, SF-30Q, SF-35, SF-35F, SF-35FQ, SF-35Q, SF-42, SF-42F, SF-42FQ, SF-42Q, SFV-20, SFV-25, SFV-30, SFV-35, SFV-42, SH-35, SH-35F, SH-42, SH-42F, SHD2542 OEM BOARD Suburban Furnace 521099 12V DC 3G Fan Control Board Replaces Suburban 520820 Will not work on NT-45S model. **Will not replace 24VAC model boards.**

Cross Reference Compatibility:

This Suburban 521099 ignition circuit board is designed as a direct fit equivalent replacement for Suburban 520820. It provides ignition and fan control for RV furnaces.

Important Notes:

• Will not work on NT-45S model
• Not compatible with 24VAC model boards

Fits Models:

• Suburban SF-30, SF-42, SF-35, SF-35F
• Suburban NT-40, NT-24, NT-30S, NT-35K, NT-20S
• Suburban P-40 Series
• Additional compatibility: DD-17-DSI, NT-12EF, NT-12F, NT-12FC, NT-12L, NT-12LE, NT-12MEF, NT-12S, NT-12SE, NT-16EF, NT-16F, NT-16FC, NT-16L, NT-16LE, NT-16MEF, NT-16S, NT-16SE, NT-16SEQ, NT-16SQ, NT-20L, NT-20LE, NT-20S, NT-20SE, NT-20SEQ, NT-20SQ, NT-20T, NT-24M, NT-24S, NT-24SP, NT-25K, NT-30K, NT-30M, NT-30S, NT-30SP, NT-34S, NT-34SP, NT-35K, NT-40, NT-42S, NT-42T, SF-20, SF-20F, SF-20FQ, SF-20Q, SF-25, SF-25F, SF-25FQ, SF-25Q, SF-30F, SF-30FQ, SF-30Q, SF-35FQ, SF-35Q, SF-42F, SF-42FQ, SF-42Q, SFV-20, SFV-25, SFV-30, SFV-35, SFV-42, SH-35, SH-35F, SH-42, SH-42F, SHD2542

Specifications:

• Voltage: 12V DC
• Type: Ignition circuit board
• Function: Ignition and fan control
• Durable construction for RV furnace applications