New POTTERTON 407725 BBU MK2 CONTROL (Genuine spare)
New PCB but box is tatty as old stock, hence the discounted price.
This part fits:
Potterton HOUSEWARMER 55
Potterton HOUSEWARMER 45
Old stock clearance item.
Clearance items do not carry warranty but we will either exchange the product or refund the payment if you return the faulty item to us undamaged within 14 days of receipt.
Please check part numbers before ordering. If in doubt, please contact us.