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Old 08-30-2015, 08:39 PM   #1
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Novice questions #3 and #4

In a previous post, I asked two questions about our "new to us" 1206KB (1996). We're hoping that we're close to understanding how everything works, and making the necessary repairs and getting the maintenance done so it can be ready to go for next weekend. We have the pump working, the water system sanitized and everything is working there. The hot water heater is tested and works (after a scary flare up from the clogged burner tube!). Everything works on 120 just fine. The fridge we just got figured out on propane and tested. Brought the fridge down from 80 to 65 in about an hour, so I figure that is working as well. The manual is somewhat helpful, but it has a lot to be desired when it comes to giving ALL the info!

Now, for the couple questions: Question #3 from this novice: Are the receptacles (like you'd plug your toaster into in the house) supposed to work while running 12 v? The lights work fine on 12 v. so I know I'm getting power to the converter. Just don't know if there is an issue that needs to be worked out with those receptacles or if they were never meant to be operational while on 12 v power. Would be awfully nice to be able to have a little clock and/or a night light at the very least. If they ARE supposed to work, are these running off the 15 amp fuse in the converter? What else should I check?

Question #4: The furnace. I get the blower to come on, but no heat. Thermostat is turned up all the way to 90 (and it's not that warm out), the power switch on the thermostat is in the ON position and the switch under the vent cover inside the camper is in the ON position as well. I am assuming that the switch under that cover is an electronic switch to open the gas valve from what it looks like. I have cleaned the 4 electrical contacts going to the gas valve. Not sure what else to try at this point. Like I said, the blower is working, just no heat, so it sounds like the burner is not igniting. There is a little tiny black switch/button on the right side of the furnace under the vent cover that says 5 amp next to it. I don't know if this is a reset button of sorts or a circuit breaker or what. It pushes in a little but it doesn't stay in, although I didn't try pushing it in while the system was powered up. This was all checked while running on 12 v power from the fully charged, new battery. Can someone enlighten me on what to check with the furnace?
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Old 08-30-2015, 08:45 PM   #2
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Q#3 the 120VAC outlets only work when you are plugged into shore power.

#4 does your furnace have electronic ignition or use a standing pilot flame?
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Old 08-30-2015, 09:36 PM   #3
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Q3: Thanks. I guess we now don't need to be trying to fix what isn't broken! Crud. I guess that means no blow dryer or toaster!

Q4: Electronic ignition...no pilot.
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Old 08-30-2015, 10:25 PM   #4
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Is your gas turned on and if multi bottle is the regulator set to use the bottle that you have open? After sitting for an extended time air will replace the gas in the line. I usually make sure I can light a burner on the stove, once that works I know I have gas to the furnace and it will come on. If the stove works {if you have one} and the furnace still doesn't come on you may need to have your system looked at.
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Old 08-30-2015, 10:52 PM   #5
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#4. You also need to be either a). hooked up to 120 volts or b). your batteries need to be close to fully charged as there are a series of switches before you get heat. The fan will run until it depletes the batteries.

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Old 08-31-2015, 06:32 AM   #6
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Also for #4 there is a time delay from when the blower starts and when the heat ignites (30 seconds or so). Are you waiting long enough for this?
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Old 08-31-2015, 06:54 AM   #7
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Stove has been lit, hot water heater has been lit and run for a while (to test if it was working), refrigerator has been lit on propane and run for an hour or so (to test it). Yes, the gas is working just fine. ;-) Propane is a two bottle system that hooks up into one regulator, and it's delivering gas to the other appliances just fine. We've only opened one of the bottles so that we'll know where we are on LP consumption while the camper is being used. When one gets empty, we'll close that and open the other.

Battery is brand new and works the lights and the water pump just fine. It also runs the fan on the furnace just fine as well.

Yes, I am aware of the fact that there is a delay before the heat actually fires. In the few times we've tried the furnace, we let it run for 2-3 minutes each time. That should be enough time to realize SOME sort of warming, shouldn't it? The fan doesn't blow very hard, that I will say. I also do not hear clicking or attempt at firing up. All I hear is the fan running.

I will get a couple of photos of the unit today and post them. Perhaps someone will see something that we are missing.
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Old 08-31-2015, 07:01 AM   #8
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If you can get the make and model # of the furnace The do a search for the manual. You may have to pull the furnace and check the fan to see if it is clogged and also check the sail switch to see if it closes. I would also check the high limit switch as it can cause the furnace not to light.
Post the make and model number.


I had a similar problem with an older furnace and found the fan was clogged.
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Old 08-31-2015, 07:22 AM   #9
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Hydro-Flame model FA7916-11

I have no idea even what or where this "sail switch" or "high limit switch" is.

Is it possible to get into the fan without removing the whole unit (which I believe would entail disconnecting the gas line)?

I have the user manual, as well as I believe the installation manual.
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Old 08-31-2015, 07:40 AM   #10
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The sail switch detects that the fan is actually moving air past the firebox. The high limit switch detects that the firebox has overheated.


When they work properly, you'll never know they're there.
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