Just fixed my Hoyme Automatic air control for my furnace. Bought it off Kijiji a few days ago for a good deal, but when I got it home, it didn't work. The seller said they could refund the money, but I told them that I will let them know after further troubleshooting what is required to get it fixed. Found out that it was a bad relay. Bought a $15 relay and soldered it in. The item now works like new. The guy will refund me the cost of the relay + $$ for my time, everyone wins.
New vs old relay:
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New relay soldered in:
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Hoyme air damper now closed. No more cold air in the basement until the furnace calls for heat:
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