Jan 25, 2024 - 07:11 AM
The "T" stands for Time Delay Relay Board. This was a temporary deviation that took place when Suburban was experiencing supply chain issues like everyone else during the beginning of COVID. The temporary deviation used 2-boards instead of just one. This setup is no longer used, in fact the parts used are no longer available. If someone needs to replace the TDR (small board with large blue relay – Part # 521304) or the Non-Fan Control Module Board (Part # 521303) on a "T" model, they are now replacing it with the appropriate conversion kit. This kit will convert from a 2-board setup back to a single board setup and will include step-by-step installation instructions (attached). I've listed the part numbers below for your reference.
Suburban Mfg 521313 Ignition Control Circuit Board; For Suburban Furnace Models NT-16SQT/ NT-20SQT/ NT-16SEQT/ NT-20SEQT/ NT-T Replacement Cores; With 521099 Board And Rewiring Instructions
Suburban Mfg 521314 ( Currently Out of Stock) Ignition Control Circuit Board; For Suburban Furnace Models SF-20QT/ SF-25QT/ SF-30QT/ SF-35QT/ SF-42QT/ SF-20FQT/ SF-25FQT/ SF-30FQT/ SF-35FQT/ SF-42FQT/ SFV-20QT/ SFV-25QT/ SFV-30QT/ SFV-35QT/ SFV-42QT/ SFV-20FQT/ SFV-25FQT/ SFV-30FQT/ SFV-35FQT/ SFV-42FQT/ SF-20VHQT/ SF-25VHQT/ SF-30VHQT/ SF-35VHQT/ SF-20VHFQT/ SF-25VHFQT/ SF-30VHFQT/ SF-35VHFQT/ SF-T Replacement Cores; With 521099 Board And Rewiring Instructions