Don't block your furnace vent.

[partsman01]

So am getting the fifth wheel ready for going away in about a weeks time, so fired up the fridge and the freezer is starting to get cold, but not the fridge part yet, anyway decide I better test out the furnace, even though I won't need it, so try turning it on at the thermostat, then the fan kicks in, then I turn the heat up all the way as it is 91 F inside and I hear it trying to start up, but it keeps trying and so I realise I better check outside and as I step outside I hear a pretty good boom, notice a little beep too from the propane detector, then I realise I left my board that was protecting my tires covering the outside vent of furnace. OOPS! Move the board, and the furnace fires up and gets warm and runs nice.
Lesson learned.
Don't block vents.

[partsman01]

So am getting the fifth wheel ready for going away in about a weeks time, so fired up the fridge and the freezer is starting to get cold, but not the fridge part yet, anyway decide I better test out the furnace, even though I won't need it, so try turning it on at the thermostat, then the fan kicks in, then I turn the heat up all the way as it is 91 F inside and I hear it trying to start up, but it keeps trying and so I realise I better check outside and as I step outside I hear a pretty good boom, notice a little beep too from the propane detector, then I realise I left my board that was protecting my tires covering the outside vent of furnace. OOPS! Move the board, and the furnace fires up and gets warm and runs nice.
Lesson learned.
Don't block vents.

[K-Star]

thanks for the advice.

[partsman01]

I have another one for you, turning off your water pump does not mean it took the pressure off your hot water tank.
My drain plug on the water tank was leaking, soooo, I turn off pump, now I remove plug, well there was a bit of pressure there, and a whole lot of water to come out too.
Thank goodness it was still cold.
Got the plug sealed, then found a leak under the sink, but it was just the nut holding the drain in the sink needed tightening.

[Offcamber]

Also make sure nothing is hanging in front of the furnace vent. I have a nicley mis-shapen fridge vent hose.