My 40 y/0 Peerless natural gas wall heater (Model V 801 A 1011) has a potentially lethal habit of occasionally delayed ignition. The standing pilot is robust and 99% of the time the external thermostat triggers the appropriate ignition. On occasion...the gas valve opens but ignition is slightly delayed and the accumulated gas (maybe 3 seconds worth) ignites with an exhuberant response. Thoughts to resolve the problem appreciated...(BTW- heater now turned off with gas supply off as well)
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