10-31-25 Direct fire Cambridge heater unit mod S950 The unit is not coming on for heat or blower. I spoke to Matt. They did have some electrical work done out here. Get up on the roof found the two service toggle switches were both in the off position. Cycled the unit up on the roof working at this time then cycled it from the thermostat downstairs system is working in heat mode. I did try to run it in summer ventilation control from the thermostat. It did not bring the blower on not a concern at this time. Also did find a tear in the belt picked up a new belt and installed and adjusted for proper tension. System is working properly at this time. Also, why I went ahead and checked the flame sensor flame sensor is reading 3.5 micro amps