Hi Don,
I have a 1995 Hydro-Flame furnace... And I had the same problem...
The most common cause is dirt-dauber nests on the burner assembly.. which does allow the gas to be ignited by the spark.
It's easy, although a little aggravating, to remove the entire assembly and clean...
#1. Turn off propane at tank
#2. unplug the wiring harness from the mother board
#3. disconnect the gas line fitting located next to the furnace
#4. remove the one wing nut located on the upper edge just inside the door
#5. slide out the entire unit... it may take some "wiggling" to get it out
#6. Clean off the clay "Globs" and blow out everything with an air hose or brush everything good with a brush of some type.
#7. Reassemble everything in reverse of how you took it out..
#8. Use a soapy water mixture to check for leaks at the propane line fitting after you screw it back together.
#9. turn on propane at tank and turn up thermostat for a test run..
This entire procedure should take about 30 minutes or less... and you can do it yourself...
thus saving a bunch of money paying a repairman to do it..
If after cleaning the unit, it still does not work,, then, you can call the repairman.
Around here they charge $85 per hour plus a $25 "Road Fee" to come out..
<span class="ev_code_RED">Caution:..</span> <span class="ev_code_blue">I recommend wearing leather gloves while do the job because the sheet metal edges are very sharp</span>
Best of luck,
John
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