www.desatech.com 113855-01A10TROUBLESHOOTINGWARNING: Never service heater while it is plugged in, connectedto propane supply, operating, or hot. Severe burns and electricalshock can occur.REMEDY1. Check voltage to electricaloutlet. If voltage is good,check heater power cord forbreaks2. Adjust motor/fan guard tokeep fan from hitting inside ofheater shell. Bend fan guard ifnecessary3. Replace fan. See Fan, page 84. Replace motor. See Motor,page 71. Repeat installation and opera-tion instructions. See Installa-tion and Operation, page 52. A) Check ignitor wire. Tightenor reattach loose ignitor wire.See Figure 11, page 8 forignitor wire locationB) Set gap between ignitorelectrode and target plate to.17" (0.43 cm)C) Tighten nut holding piezoignitor to base of heaterD) Replace ignitor electrode.See Ignitor, page 81. This can happen when runningheater in temperatures above85°F (29.44° C). Run heaterin cooler temperatures2 Check heater inlet and outlet.Remove any obstructions3. Replace fan. See Fan, page 84. Clean heater. See Mainte-nance, page 7OBSERVED FAULTFan does not turn when heater isplugged inHeater will not igniteHeater shuts down while run-ningPOSSIBLE CAUSE1. No electrical power to heater2. Fan hitting inside of heatershell3. Fan blades bent4. Defective motor1. User did not follow installa-tion or operation instructionsproperly2. No spark at ignitor. To test forspark, follow step 8 under Ig-nitor, page 9. If you see sparkat ignitor, have heater servicedby qualified service person. Ifno spark seen:A) Loose or disconnectedignitor wireB) Wrong spark gapC) Piezo ignitor looseD) Bad ignitor electrode1. High surrounding air tem-perature causing thermal limitdevice to shut down heater2. Restricted air flow3. Damaged fan4. Excessive dust or debris insurrounding areaWARNING: Use only in areasfree of high dust content.