Our three year old Danby DPR2262w propane refrigerator is not cooling. The flame never seems to change from one setting regardless of the thermostat setting. The flue is clean and we are sure the gas pressure is right. But it just seems to stay constant and never cool down. Ideas? Bad thermostat or sensor maybe?

Refrigerators - Danby - DPR2262 Top Freezer Refrigerator