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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22626
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Error code four flashes indicates limit switch open Fuenace

Customer Question

Error code four flashes indicates limit switch open
Fuenace didnt wirk in winter. Blower is making ac not blow continously eveyfive minutes shuts off
Submitted: 2 years ago.
Category: HVAC
Expert:  BillyHvac replied 2 years ago.
Hello,
open limit means an overtemp switch has opened on the front wall of furnace.
If it is stuck open it will need to be replaced.