I have a Frigidaire gas (propane) dryer that isn't drying. Doesn't seem to be getting warm enough. With front panel of , ran dryer...igniter comes on, lights flame and looks good. Only burns for 1 1/2 minutes then goes out for 4 or 5 minutes. With front panel reinstalled, I hear igniter light burner, but again goes out somewhat quickly. After a few minutes I hear a rattling/gurgling sound and then a click and rattling sound stops immediately. Happens every 30 seconds or so. Can someone give me a clue of what's going on? Model number is CRGR57OOAS0 Thanks in advance for any assistance.