**Be sure you have a Spare Control on Hand**Hard To Find--Great Controller--Never installed, But Was used several times to test Boiler Systems. JUST TESTED AND WORKING 100%,  But Sold "AS-IS"**.  MAIN CONTROLLER FOR QXM8 QUIETSIDE OIL FIRED BOILERS: 85,000; 120,000; 150,000 BTU ONLY. HAVE OTHER PARTS FOR THIS BOILERS, NEW OR USED STILL  AVAILABLE IN VERY LIMITED NUMBERS, PLEASE SEE MY OTHER E-BAY AUCTIONS OR INQUIRE VIA E-BAY MAIL.  **PLEASE NOTE: ALL MY QUIETSIDE ITEMS SOLD "AS-IS" AS FOUND, WITHOUT RETURN OR REFUND.  ALL OFFERS ARE WELCOME. <<<< Please check on your Boiler numbers located on top left corner, before ordering>>>>>