9099507OWNER’S MANUALOBSERVED PROBLEMHeater ignites, but flame-out control shutsoff heater after a short period of timeHeater burns, but puffs of smoke can be seenHeater does not burn steadyHeater burns with odorHeater smokes continuously1. Wrong pump pressure2. Dirty fuel filters3. Dirt in nozzle4. Dirty photocell lens5. Open or damaged photocell6. Bad flame-out control7. Damaged fan switch1. Wrong pump pressure2. A) Heater almost out of fuelB) Water condensation in fuel tankC) Wrong fuel3. Dirty fuel filters4. Air leak in suction system5. Dirty nozzle6. Low voltage causing motor to operatebelow rated speed7. Loose fuel line1. Adjust pump pressure (see Pump Pres-sure Adjustment, page 11)2. Clean fuel filters (see Fuel Filters,page 12)3. Replace nozzle (see Nozzle, page 10)4. Clean photocell lens with clean cottonswab5. Replace photocell6. Replace flame-out control7. Replace fan switch1. Adjust pump pressure ( see Pump Pres-sure Adjustment, page 11)2. A) Add fuel to tankB) Check fuel tank for bubbles of waterin bottom. If found, remove fuel (seeStoring, Transporting, or Shipping,page 5). Clean tank and fuel filters(see Fuel Filters, page 12). Fill withclean fuelC) Remove wrong fuel (see Storing,Transporting, or Shipping, page 5).Clean tank and fuel filters (see FuelFilters, page 12. Fill with correct fuel3. Clean fuel filters (see Fuel Filters,page 12)4. Tighten all fuel line connections (seeFuel Lines, page 12)5. Replace nozzle (see Nozzle, page 10)6. Check voltage at heater. Voltage at heatershould be not less than 90% of rated volt-age (108V minimum for 120V heaters)7. Check and tighten all fuel line connec-tions (see Fuel Lines, page 12)POSSIBLE CAUSE REMEDYTROUBLESHOOTINGContinuedwww.desatech.com