Product Description
Suburban 12V DC Furnace Ignition Control Module Board w/ Fan Control (521099) (fits all Suburban Furnaces and select Suburban Water Heaters) FREE SHIPPING!
This Suburban ignition control circuit board works on all Suburban 12V furnaces and Suburban water heater model 520820. This Suburban board also has fan control.
Replacement for 520820 and 520741
Will Not Replace 24 Volt AC Boards
Dimensions: 6.5" x 0.5" x 2.6"
Note*- Different suppliers are used for some components which may cause boards to appear different. Functionality is the same between all boards!
Works with models:
DD-17-DSI / NT-12S / NT-12SE / NT-16S / NT-20S / NT-16SE / NT-20SE / NT-24S / NT-24SP / NT-24M / NT-25K / NT-30SP / NT-34S / NT-42T / NT-16SQ / NT-20SQ / SF-20 / SF-20F / SF-25 / SF-25F / SF-30 / SF-30F / SF-35 / SF-35F / SF-42 / SF-42F
SF-20Q / SF-20FQ / SF-25Q / SF-25FQ / SF-30Q / SF-30FQ / SF-35Q / SF-35FQ / SF-42Q / SF-42FQ
SF-20VHQ / SF-25VHQ / SF-30VHQ / SF-35VHQ / SF-42VHQ / SF-20VHFQ / SF-25VHFQ / SF-30VHFQ / SF-35VHFQ / SF-42VHFQ
Warranty: Limited 90 days
* PART NUMBERS LISTED BELOW REQUIRE THE LINKED WIRING KIT TO OPERATE THIS BOARD
Click Links Below For Wiring Kit To Convert Non-Fan Control Models
SF-20/25/30/35/42; SF-20/25/30/35/42F
Dinosaur Electric Alternative
*Control boards can not be returned after attempted use
Product Videos
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Product Reviews
22 Reviews Hide Reviews Show Reviews
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Function
Didn't work for my furnace. I installed just like instructions said. Fan short cycled and never lite the furnace. I asked to return it and they said it was my fault. I hooked up a older board and my furnace works. So I guess they are just stealing my money.
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Sf 20 circuit board replacment
I bought this board for a sf 20 furnace and worked perfectly
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Worked perfectly.
Worked great. Your board may show 3 spade connectors, but one is a double connection and makes it look like 3 is needed, but you only need two. This fixed my heater issue.
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Motherboard
Reasonably easy to remove and install and works well. Good longevity will improve it’s rating but I just got it.
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Worked as intended
For the model I repaired furnace SF30FQ I had to move the cables to I had more slack to reach the side of the board, the OEM product in this model has the 4 pin connector on the "bottom" of the control board. Other than that slight modification the board worked exactly as it should have. Happy Customer.
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Purchase
We purchased a circuit board for our furnace. It was delivered in 3 days. That was not the problem unfortunately, but they were very helpful in helping us diagnose the issue. I recommend this company very highly
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Board
Exact fit plug a play , works great so far.
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Control board
Ezpz plug and play works great
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Circuit board
Parts description gave enough information to help me purchase the correct part. This resolved the problem.

