The reason the control valve is opening slowly is the the Thermopile needs to be replaced. The Thermopile generates millivolts of electricity from the heat of the pilot flame, which then opens the gas valve when heat is called for. Also, check the pilot flame to make sure it's engulfing the thermopile. If it's not the pilot needs to be cleaned.
The Empire Comfort Systems, Thermopile part number is 672063
If I can be of further help, please let me know through the leave a comment link.
Answers & Comments
The reason the control valve is opening slowly is the the Thermopile needs to be replaced. The Thermopile generates millivolts of electricity from the heat of the pilot flame, which then opens the gas valve when heat is called for. Also, check the pilot flame to make sure it's engulfing the thermopile. If it's not the pilot needs to be cleaned.
The Empire Comfort Systems, Thermopile part number is 672063
If I can be of further help, please let me know through the leave a comment link.