23If you smell gas• Shut off gas supply.• Do not try to light any appliance.• Do not touch any electrical switch; do not useany phone in your building.• Immediately call your gas supplier from aneighbor’s phone. Follow the gas supplier’sinstructions.• If you cannot reach your gas supplier, call thefire department.POSSIBLECAUSE1. Metal expanding whileheating or contractingwhile cooling1. Heater burning vaporsfrom paint, solvents,glues, etc.2. Gas leak. See Warn-ing statement attop of page.1. Not enough fresh air isavailable2. Low line pressure3. ODS/pilot is partiallyclogged.1. Gas leak. See Warn-ing statement attop of page.2. Control valve defective1. Foreign matter be-tween control valve andburner2. Gas leak. See Warn-ing statement attop of page.OBSERVEDPROBLEMHeater produces aclicking/ticking noisejust after burner is lit orshut off.Heater produces un-wanted odors.Heater shuts off in use.(ODS operates)Gas odor even whencontrol knob is in OFFpositionGas odor during com-bustionREMEDY1. This is common withmost heaters. If noise isexcessive, contact quali-fied service person.1. Ventilate room. Stop us-ing odor causing prod-ucts while heater is run-ning.2. Locate and correct allleaks (see Checking GasConnections, page 11).1. Open window and/ordoor for ventilation.2. Contact local natural gascompany.3. Clean ODS/pilot (seeCleaning and Mainte-nance, page 20 ).1. Locate and correct allleaks (see Checking GasConnections, page 11).2. Replace control valve.1. Take apart gas tubingand remove foreignmatter.2. Locate and correct allleaks (see Checking GasConnections, page 11).!WARNING ICON G 001WARNINGTROUBLE-SHOOTINGContinued