Bad or Failing Blower Motor Relay If the blower motor does not function, fuses are blown, or relays are melting, you may have to replace the blower motor relay. The blower motor relay is the electrical switch that is used to supply the power for the Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Share on Pinterest (Opens in new window) Pinterest More Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Share on Reddit (Opens in new window) Reddit Share on Tumblr (Opens in new window) Tumblr Share on Telegram (Opens in new window) Telegram Share on WhatsApp (Opens in new window) WhatsApp