RV Repair: Suburban Gas Furnace SF-30f, camper rv, furnace blower

Question
Recently I connected the battery in reverse. Have everything working again except the gas furnace. Blower comes on, but no ignition. I hoping to find some trouble shooting info to help guide me to whatever component went bad.Hope you can help. Thank you in advance. Pat

Answer
Most likely, since you said the battery was reversed, your circuit board is bad. This board is located in the heater housing, easy to find too, there will be 4 wires (red, yellow, and 2 blue) those connect to the circiut board. And that board controls everything to do with ignition and the gas valve, and most the time if it foes bad the fan will run but nothing else will happen. So I'd start there. You can find a replacement at most camper/RV dealer and repair location, feel free to follow up with any other questions you may have...good luck