www.desatech.com119169-01E 19TROUBLESHOOTINGWARNING: Turn off and unplug heater and let cool before servicing.Only a qualified service person should service and repair heater.CAUTION: Never use a wire, needle or similar object to cleanODS/pilot. This can damage ODS/pilot unit.Note: All troubleshooting items are listed in order of operation.POSSIBLE CAUSE1. Ignitor electrode positionedwrong2. Ignitor electrode broken3. Ignitor electrode not con-nected to ignitor cable4. Ignitor cable pinched orwet5. Broken ignitor cable6. Bad piezo ignitor1. Gas supply turned off orequipment shutoff valveclosed2. Control knob not in PILOTposition3. Control knob not pressedin while in PILOT position4. Air in gas lines when in-stalled5. Depleted gas supply (pro-pane/LP gas only)6. ODS/pilot is clogged7. Gas regulator setting is notcorrectOBSERVED PROBLEMWhen ignitor button ispressed, there is no spark atODS/pilotWhen ignitor button is pressed,there is spark at ODS/pilot butno ignitionREMEDY1. Replace pilot assembly2. Replace pilot assembly3. Reconnect ignitor cable4. Free ignitor cable if pinchedby any metal or tubing.Keep ignitor cable dry5. Replace ignitor cable6. Replace piezo ignitor1. Turn on gas supply or openequipment shutoff valve2. Turn control knob to PILOTposition3. Press in control knob whilein PILOT position4. Continue holding downcontrol knob. Repeat ig-niting operation until air isremoved5. Contact local propane/LPgas company6. Clean ODS/pilot (seeCleaning and Mainte-nance, page 18) or replaceODS/pilot assembly7. Replace gas regulator