Said It Here

Should I replace my oil boiler or repair it?

Homeowners trying to figure out if an existing oil boiler needs a full replacement or just a deep cleaning risk spending large amounts of money prematurely. They also struggle to determine whether to disconnect the setup or reconnect the same type of boiler to their water heater.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Switching to a high efficiency combi boiler
  2. 2
    Installing a heat pump water heater
  3. 3
    Replacing the boiler with one that doesn't have a tankless coil
  4. 4
    Replacing components like the thermocouple themselves
  5. 5
    Seeking a second opinion or attempting to deep clean and brush out the heat exchanger

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/hvacadvice2 people · September 2026

“This is set up when we bought the house. Need new boiler, disconnect or get same exact boiler hooked up to water heater?”source ↗

hmk2123 · r/hvacadvice · 1 upvotes

“how would we know if this truly needs replacing or if a deep cleaning can do it? We are really just trying to exhaust our options before we commit to a full new unit and spend all that money.”source ↗

dildo_swaggins98 · r/hvacadvice · 1 upvotes

Where this came up

People with this problem also raised