I know we don't typically ask tech advise on RV's but......

We have a 1994 coachman 5th wheel with a non-working furnace. These 12volt furnaces aren't super complicated, just want to know I'm on the right track.

 I have tested the sail switch-good. The over limit switch-good. I hear clicking when it tries to fire, there is spark at the electronic ignitor, nice and blue. just no fire. I also checked for gas flow to the valve of the unit-good. This leaves me with a possible bad gas valve on the furnace. I had 12v at the solenoids on the valve, it just doesn't seem to open to supply gas to the burner. Does this sound correct? Am I maybe missing something before I order a gas valve? Is there a way to bench test or clean it? 

 Thanks.

This video might help and save you some money too.

 

 That helps a lot, Thanks @IBMobile

 @IBMobile, thank again for the above video. Turns out it was the gas valve. Replaced it today, we now have a working furnace. 

 Also changed out the kitchen faucet at the wifes request. She now has one with the retracting sprayer built into the faucet head. Looks nice i must say.