Errors

• - select type -
• Challanger Solo CC50s
• Challenger CC85
• Challenger Combi CC105
• Challenger Combi CC125H
• Challenger Solo CC105s
• Challenger Solo CC125Hs
• Challenger Solo CC150s
• Challenger Solo CC85s
• Keystone KS 1000
• Keystone KS 1200
• Keystone KS 399
• Keystone KS 500
• Keystone KS 600
• Keystone KS 750
• Keystone KS 850
• Keystone KW 199
• Keystone Kw 285
• Keystone KW 399
• Keystone KW 500
• Keystone KW 600
• keystone KW 750
• keystone KW 850
• MARQUIS TWH200
• MARQUIS TWH200LP
• Prestige ACVMax 110
• Prestige ACVMax 155
• Prestige ACVMax 175
• Prestige ACVMax 250
• Prestige ACVMax 299
• Prestige ACVMax 399
• Prestige ACVMax Excellence PTE 110
• Prestige ACVMax80
• Prestige Trimax110 Solo
• Prestige Trimax175 Solo
• Prestige Trimax250 Solo
• Prestige Trimax399 Solo
• Prestige Trimax60 Solo

• - select code -
• 11
• 16
• 20
• 29
• 31
• 32
• 33
• 35
• 39
• 40
• 41
• 43
• 61
• 65
• 66
• 67
• 72
• 73
• 76
• 94

Boiler type MARQUIS TWH200

Error code 43

Cause:

Burner Overheat Switch Open

Solution:

Press the Power button to clear the Error Code. If Error happens again:
1. Check burner overheat switch connections. Ensure connections are secure.
2. Check switch resistance. If resistance is zero, replace the switch.
3. If the problem persists, replace the main control.