What to do if my Graco Paint Sprayer primary heater(s) does not heat?
- JJoshua RodriguezAug 25, 2025
If the primary heater(s) isn't heating, here's what you can do: * If the heat is turned off, press the zone keys. * Check the temperature display for a diagnostic code if there's a temperature control alarm. * If there is a signal failure from the thermocouple, see E04: Thermocouple disconnected, page 33. * Check the resistance of the heater elements if the heater element has failed.