Product Overview
The TP-390 is a small circuit board adapter, not a circuit board itself. It is used whenever a failed control board on an older unit is being swapped for a current TP-351A or TP-78D board, and the heater's original wiring harness terminates in the older TP-78B-style connector that the new board does not accept directly. The adapter bridges that connector mismatch: the original harness plugs into one end of the TP-390, and the new TP-351A or TP-78D board plugs into the other, so the factory wiring can be reused without rewiring the burner control box.
Fits the DBS, DX, and DRV low-intensity tube heater families that use a TP-78B-style harness. See Fitment below for the full model list.
Ships alone as a connector piece and is sold separately from the replacement board.
Replacing this part: confirm from the installation sheet whether the specific model and harness need the TP-390 adapter before ordering. Shut off gas and disconnect electrical power to the heater before opening the burner control box. Installation must be performed by a qualified service person; improper installation, adjustment, or service can cause property damage, injury, or death. Full step-by-step instructions are in the circuit board replacement instruction sheet.
Specifications
| Function | Adapter that connects the original heater wiring harness to a replacement TP-78D or TP-351A circuit board |
| Mates with | TP-351A, TP-78D to TP-78B |
| Wiring harness interface | 7-lead harness connection at adapter: RED, BLK, BLK, BLK, GRN, BLK, WHT |
| Shipping method | UPS or USPS |
Cross-Reference & Fitment
| Alternate part numbers | 6188149, 24KT52 |
| Fits | DTHS-3, DTH-3, DBS, DRV, DX (w/direct sense), DX (w/remote sense), XTS (8/1/99 - 11/6/00) |
Documents
- tp-390-install.pdf (install)
