Intertherm gas furnace model number m6bb070abfc01

Question

To whom it may concern, I have a intertherm furnace gas powered hot air and it has a pilot light but does not respond to thermostat settings not even fan setting BUT if I got into the unit and hit fan switch for air circulation the fan does go on BUT not from the thermostat. It was working untill; morning yesterday. I open ed thermostat and moved temp up to ninety and watched fopr a flash from the mercury switch and there was none. I opened the control box inside the furnace and saw two relays or apparently relays in appearence.

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