I have a versa c 185B pool heater. I have the gas on and my pilot light is lit but I am not able to get the heater going. Last year my pool company replaced the switch to the heater when I was having similar problems. Could a switch fail after only one season. Any trouble shooting ideas as my pool company is being bad about returning calls today and I have strict orders from the commander to get the heater going!

Thanks in advance for any suggestions.