Both services can be valid in the right context, but they are not interchangeable. Scope should match verified behavior and access needs, not label familiarity.
Primary question
How do I decide between chemical wash and chemical overhaul without overpaying?
Chemical wash usually targets accessible buildup and recovery of airflow performance.
Chemical overhaul is deeper disassembly-level work used when condition and recurrence justify wider scope.
If performance decline is recent and no strong recurrence pattern exists, bounded lighter scope may be defensible.
If performance issues recur quickly after prior work, deeper access and verification may be justified.
Ask for one recommendation with explicit reasoning and pause-right handoff.
A practical framework for deciding between chemical wash and chemical overhaul without over-servicing.
Understand when gas top-up is only temporary relief and when leak-path verification should be prioritized.
Use this framework to check whether a recommendation is evidence-backed before committing budget.
Tell us what is happening. We will assess first, advise one clear next step, and you decide.
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