Multiple problems can be causing this: 1.burner orfice restricted 2. make up air 3. blower motor or relay defective 4.gas pressure to high 5. not enough gas pressure 6. restriction in gas line 7. defective gas valve 8. defective control or ignition module........recommend qualified tech. to look at
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Multiple problems can be causing this: 1.burner orfice restricted 2. make up air 3. blower motor or relay defective 4.gas pressure to high 5. not enough gas pressure 6. restriction in gas line 7. defective gas valve 8. defective control or ignition module........recommend qualified tech. to look at