Image is for illustration only and should not be relied upon
Honeywell 40003916-003 V4073A Replacement Powerhead
£100.60
Ex VAT: £83.83
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F5-0043 is the date code (made in 2000). If it is 3-port, with a metal case, and 5-wire, then the 40003916-003 is the correct one.
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No. The 001 head is for 2-port valves.
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It sounds like it could be on it's way out.
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Yes all the electrical parts inside are included. The brass valve body that this fixes on top of is not included.
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Some people do prefer the Honeywell branded one. If they are failing regularly, then I would recommend fitting a 40003918-007 repair kit as well as a magnetic filter (like a Magnaclean) and making sure you have enough inhibitor in your system.
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It is the longer of 18 months from date of manufacture, or 1 year from date of purchase.
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It could be a wiring issue or the valve body could be stuck.
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