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Servicing should only be performed by a Qualiﬁ ed Service Agent
TEST 6: BLOWER ON, NO IGNITION
Plugs in receptacles•
Blower (Draft Inducer) operating•
No power to Hot Surface Igniter (HSI). Note LED flash code.•
Hot Water Outlet
Check E4 pin 2 to ground
24 VAC Check of Blower Prover Switch Circuit
ignition board receptacles E1, Pin 7 to ground
shows no voltage
replace Ignition board.
E1, Pin 7 has 24 Volt to ground check wire connection to and from blower (draft inducer).
voltage check of each blower switch terminal to
ground shows voltage to only 1 terminal
• switch is open. Check for proper draft (should also see LED 3 flash code).
• check for blocked exhaust.
• check that blower outlet exhaust damper is open.
• replace blower prover switch.