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Question Summary
Turbo Max Plus 837E No DHW on demand, water runs no ignition Replaced Aqua sensor, remained the same Replaced PCB, remained the same Turn Temp control to Max, run water 4 mins (approx) flip the tap off and on, boiler ignites and produces hot water but fails to modulate properly Any ideas?Regards ***** is early 2000Sorry cannot be more specific Regards ***** ***** PaulAnswer Summary
Phil : All work to be done by licensed professional...I come and go, be patient. Phil : on the modulation issue, you may be expecting too much from the appliance... the sales presentation often does not live up to how some of these things work.... Phil : Let me know what you think, we can go from there.
Answered in 15 minutes by:
9/12/2011
alumalite, Plumber
Category: UK Plumbing
Satisfied Customers: 12,960
Experience: Retired mechanical engineer, Boiler, HVAC, and Electrical contractors licenses (inactive).
VerifiedPhil :
All work to be done by licensed professional. WE KEEP GOING UNTIL YOU ARE HAPPY . . . I come and go, be patient.
Phil :
The units flow switch is either not properly adjusted, or is sticking... or you are running the hot water to slow to actuate the switch.
Phil :
on the modulation issue, you may be expecting too much from the appliance... the sales presentation often does not live up to how some of these things work....
Phil :
Let me know what you think, we can go from there.
Phil :
Phil
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 4,029
Experience: Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
VerifiedHi my name is XXXXX XXXXX I will try and sort your problem in the shortest possible time. How old is your Vaillant boiler? If you let me know I can dig out the correct wiring diagram.
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