There should be a removable panel on the bottom front. Remove this panel and you should see gas valve with two lines going into combustion chamber. The larger of the two will be for burner and the smaller to the pilot light. There may be lighting instructions on the inside of panel,or on front of burner compartment. If not look at gas valve and see if you can see where it is marked off pilot and on. Turn thermostat to lowest setting and gas valve to pilot ,locate pilot light and hold match to it while you depress pilot button . Pilot should light. If it does hold button depressed for 1 to 2 mins. Release pilot button and if pilot stays lit turn valve to on. Turn thermostat up to desired setting and see if burner comes on. If it does you should be done. Put cover back on. If pilot light does not stay lit or burner won't light I Would recommend you call a service tech as there are several things that could be wrong. Hope this helps you.Thanks