Upon arriving for water heater inspection, water heater had an error code showing thermopile voltage was low. Attempted to lite water heater. WTer heater stayed lit for approximately 5 minutes then showed the error code. Attempted to lite water heater once more and was able to get it to lite and status light was showing normal operation. Recommended to customer to replace water heater with new Bradford white after heater or at minimum replace thermopile assembly kit. Thermopile assembly kit will have to be special order and can rake several days to be delivered.