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Burnham Revolution RV4NSL-L2 no ignition
I have Burnham Revolution RV4nsl-l2 boiler installed around 2000. About a week ago I have installed 2 programmable thermostats LuxPro instead of old Honeywell dial-style ones.
Shortly after the installation I've noticed that sometimes the heat doesn't turn on as programmed, and after visual inspection I've noticed that there was no pilot light, and even though thermostats were working properly, the water in pipes was cold. I turned the boiler off and then back on, and the light lit and the water started heating up, so it was my fix for a few days.
This morning restarting the boiler didn't make the pilot light appear, so currently my heating system is not working at all. I've tried restarting it a few times, I can hear the sound of water being pumped through the pipes, but the water is not heated, as there is no pilot light and burners are off.
Honeywell SV9502 controls the gas and ignition, I tried switching gas control on and off without any luck.
Please let me know what can be done in this situation.
Thank you in advance.