schnackj Posted October 24, 2012 Share Posted October 24, 2012 Hello all, I've gotten a lot of help fixing up my camper from here already and I thought I would make an account and ask a question I haven't found I have a 1980 Dolphin, the one with the tandem axles, and have an issue with the furnace. I can get the pilot light to come on, and the blower to come on but the main burner doesn't seem to work. Its not an issue with the regulator because the water heater burner seems to work great. has anyone seen this before thanks in advance Quote Link to comment Share on other sites More sharing options...
waiter Posted October 24, 2012 Share Posted October 24, 2012 Do you have the make and model # of the furnace? I'm not sure how the old style furnaces cycle, i.e. fan runs to purge combustion chamber or not.??? If it has a pilot light, its an old model (newer units have electronic ignition) Make sure the thermostat really is working, Does the unit try and light when you turn up the heat on the thermostat. - Some of these thermostats have an ON/OFF switch on the bottom, make sure it ON. You may be able to jumper the thermostat wires on the furnace to bypass the thermostat. Listen for a very light click sound when you do this to listen for the gas valve is opening. John Mc 88 Dolphin 4 Auto Quote Link to comment Share on other sites More sharing options...
Derek up North Posted October 24, 2012 Share Posted October 24, 2012 Make & Model would be very useful. The fan is blowing, but is the sail switch working? Quote Link to comment Share on other sites More sharing options...
Derek up North Posted October 24, 2012 Share Posted October 24, 2012 The whole MH acts as a sail. Only effective, unfortunately, running before the wind. Quote Link to comment Share on other sites More sharing options...
schnackj Posted October 25, 2012 Author Share Posted October 25, 2012 thanks for the tips, I'll check these out and update Quote Link to comment Share on other sites More sharing options...
schnackj Posted October 25, 2012 Author Share Posted October 25, 2012 and its a due therm 66012-005 Quote Link to comment Share on other sites More sharing options...
Derek up North Posted October 25, 2012 Share Posted October 25, 2012 This is probably the Manual you need: http://bryantrv.com/docs2/docs/operating/dt6600.pdf Quote Link to comment Share on other sites More sharing options...
schnackj Posted October 25, 2012 Author Share Posted October 25, 2012 I think I need to check out that airflow sensor, looks like thats the likely hangup Quote Link to comment Share on other sites More sharing options...
Maineah Posted October 25, 2012 Share Posted October 25, 2012 You need a fairly hot battery to turn the fan fast enough to close the sail switch and no restrictions in the air flow (bees nest etc.) You might try it while it's plugged in that will give it a voltage boost and check the furnace port on the side of the MH and make sure there is nothing in it. Another problem is often the igniter board they do fail with age. The manual Derek suggested shows you where the proofing chain is (sail switch/over temp), they have to be satisfied before the gas valve will open so if you check the voltages right on the board and they are correct the board is toes up. Dinosaur boards are the best ones IMHO they will try to light 3 times the stock one’s only once they make one now the even turns off the fan so it does not just blow cold air until the battery dies. Quote Link to comment Share on other sites More sharing options...
83 SunRader Posted December 28, 2012 Share Posted December 28, 2012 You need a fairly hot battery to turn the fan fast enough to close the sail switch and no restrictions in the air flow (bees nest etc.) You might try it while it's plugged in that will give it a voltage boost and check the furnace port on the side of the MH and make sure there is nothing in it. Another problem is often the igniter board they do fail with age. I'm having difficulties getting my hydro flame furnace to fire up (it lights 1 in 20 attempts) and I'm also looking for the elusive sail switch. I think that may be the culprit. Quote Link to comment Share on other sites More sharing options...
Maineah Posted December 28, 2012 Share Posted December 28, 2012 I'm going to say igniter board.Turn your heat up to max once the fan is running check the white wire on the igniter control board it is the end of the proofing chain if it has 12 volts the sail switch, over heat, and thermostat are working. Quote Link to comment Share on other sites More sharing options...
stamar Posted January 13, 2013 Share Posted January 13, 2013 Make & Model would be very useful. The fan is blowing, but is the sail switch working? oh ya pull the vent cover off and then turn it on and watch the sail switch. tons of stuff gunks up that thing. has to jam up eventually actually Quote Link to comment Share on other sites More sharing options...
stamar Posted January 14, 2013 Share Posted January 14, 2013 I can literally hear my sail switch. And i hear it louder when it fails to engage. Quote Link to comment Share on other sites More sharing options...
Maineah Posted January 14, 2013 Share Posted January 14, 2013 noisy little buggers aren't they Quote Link to comment Share on other sites More sharing options...
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