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Thread: Recirculating pump not working after water heater replacement

  1. #1
    DIY Junior Member Mmonagan's Avatar
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    Jan 2013
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    Default Recirculating pump not working after water heater replacement

    I had my 40 gal hot water heater replaced and now the recirculating pump isn't working. The plumber feigns ignorance. My question(assuming its getting power): is there something that has to be done to the pump (priming?) to get it working again? The pump is a Grundfas.

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
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    You may have to remove the heat trap on the hot outlet. It serves no purpose anyway if you use a recirc. My guess is the old tank didn't have heat traps.

  3. #3
    DIYer, not in the trades LLigetfa's Avatar
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    My other thought is perhaps some sediment got into the pump and it no longer turns.

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