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Hello,
I am servicing an 18 year old pulse boiler. The unit has been well maintained and is currently operable. I recently replaced the fan prove switch which I believe was causing erratic starting. If the problem persists the next step is new ignition module ($800.00). This part is hard to find, but available. Considering the boilers age. Is it worth replacing there ignition module? I have seen the heat exchangers last up to 27 years and others last 12. Please advise of any experiences with the Hydrotherm pulse boilers. Thanks
 
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