hot surface ignitors are notorious for failing or getting "weak" and not draw enough amperage ( 3.2 - 3.6 amps ).... replacing both ignitors is always a good idea to start out with as the gas bi-metal valves don't fail very often. Ignitors can be replaced relatively easily ( with the POWER OFF ).... replacement ignitors can be ordered here, im sure..Ceramic bases should be similar / exact size and mounting bracket should be as close to exactly the same as original as possible!!!
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regards
jim
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