5H0797490000 Modine Ignition Control Board

5H79749b Ignition Control Board

The 5H0797490000 Modine ignition control board (also 5H79749) is an OEM replacement for Hot Dawg, PTP, PTS, PTC, BTS, BTC, and IPT series heaters in stock and ready to ship. Not sure this fits your unit? Call us to verify before you order.

Heater Series	Compatible Models
HD (after 5/07, DSI)	HD30AS, HD45AS, HD60AS, HD75AS, HD100AS, HD125AS
HDS (after 5/07, DSI)	HDS30AS, HDS45AS, HDS60AS, HDS75AS, HDS100AS, HDS125AS
HDB	HDB60, HDB75, HDB100, HDB125
HDC	HDC60, HDC100, HDC125
PTP	PTP150, PTP175, PTP200, PTP250, PTP300, PTP350, PTP400
PTS	PTS150, PTS175, PTS200, PTS250, PTS300, PTS350, PTS400
PTC	PTC55, PTC65, PTC85, PTC110, PTC135, PTC155, PTC156, PTC180, PTC215, PTC260, PTC310
BTS	BTS150, BTS175, BTS200, BTS250, BTS300, BTS350, BTS400
BTC	BTC215, BTC260, BTC310
IPT	IPT50, IPT60, IPT75, IPT100, IPT125, IPT150, IPT175, IPT200

HD and HDS models must have a manufacture date after May 2007 with direct spark ignition (DSI). HDB, HDC, and all other listed series are compatible regardless of manufacture date. Check your unit’s serial plate to confirm the build date and ignition type before ordering.

Warranty claims and returns are processed directly through Heinlein Supply, your authorized Modine distributor.

Call now for an accurate price quote and estimated delivery time.

773-774-8616

What the 5H79749 Ignition Control Board Does in Your Heater

The ignition control board manages the entire startup sequence on direct spark ignition (DSI) heaters. When the thermostat calls for heat, the board opens the gas valve, fires the spark igniter, and confirms flame through the flame sensor. If the sensor does not detect flame within a few seconds, the board locks out the system to prevent unburned gas from building up.

A failing board can cause repeated lockouts, no-heat calls, or intermittent ignition. If your heater sparks but will not stay lit, or if it locks out after several ignition attempts, the ignition control board is one of the first components to check. The flame sensor and wiring harness should also be inspected before replacing the board.

Hot Dawg Date Code and Ignition Type Requirements

This board only fits Hot Dawg HD and HDS models built after May 2007 that use direct spark ignition. Earlier HD and HDS units with standing pilot ignition use a different control board.

You can find the manufacture date on the serial plate, usually on the side of the heater cabinet. If your unit has a standing pilot flame, this is not the correct board.

HDB and HDC models shipped with DSI from the factory and do not have a date restriction. All PTP, PTS, PTC, BTS, BTC, and IPT models listed in the compatibility table above are also compatible without date limitations.

If you are unsure which board your heater needs, call us with your model and serial number.

Frequently Asked Questions

How do I know if my ignition control board has failed?

The most common signs are repeated lockouts, a heater that sparks but will not stay running, or no spark at all when the thermostat calls for heat. Before replacing the board, check the flame sensor, wiring connections, and gas supply. If those components test fine and the problem continues, the board is the likely cause.

Is the 5H0797490000 the same as the 5H79749?

Yes. Modine uses both numbers for the same part. The 5H0797490000 is the full catalog number and 5H79749 is the short form. Either number will pull up this ignition control board.

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