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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My nordyne model mlmb056asw will not light and it has a

Customer Question

my nordyne model mlmb056asw will not light and it has a flashing red led light that flashes 3 says the pressure switch is closed. is this a gas valve problem or could it be a thermostat problem as I could change the thermostat myself.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

Hello, do you know what/where the pressure switch is?

size of hockey puck, small rubber tube attached and 2 wires?