Quick answer
- Isolated electrical or fan failures on a younger unit usually favor repair.
- Compressor + heat exchanger + controls on an aging chassis usually favor replace.
- Factor crane mobilization: bundling replacements can beat serial emergency repairs.
When this applies
You have a repair quote in hand
A compressor, heat exchanger, or economizer repair landed and you need a structured replace comparison before approving.
The unit is mid-life with rising service tickets
You are past the honeymoon and before total failure — the best window for planned replacement analysis.
Capital planning for a multi-RTU roof
You want a portfolio rule set so each unit is not a one-off argument.
Options to evaluate
Repair when
The failure is discrete (contactor, capacitor, motor, TXV, board) on a unit under roughly 12–15 years with a solid cabinet, clean heat exchanger, and available refrigerant support. Repair wins when the cost is a modest fraction of replacement and the rest of the system passed inspection. Tradeoff: you keep older efficiency and may face another major failure next season.
Replace when
Multiple major components are due, the heat exchanger is cracked, the cabinet is corroded, economizer/OA paths are obsolete, or parts/refrigerant lead times make another repair a gamble. Replacement resets efficiency, controls, and documentation (Title 24 path). Tradeoff: higher upfront cost and crane logistics — mitigated by planning off-peak.
Bridge repair, then planned replace
Stabilize a critical unit through peak season with a targeted repair while budgeting a scheduled changeout. Tradeoff: you spend money you will not fully recover — only rational when downtime now is intolerable and capital needs a quarter to assemble.
Typical cost ranges
Ranges vary widely by tonnage, curb work, crane, and electrical. Use these as relative planning bands for light commercial RTUs in our markets — not quotes.
| Option | Typical range | Notes |
|---|---|---|
| Targeted component repair | Low thousands (typical) | Motors, controls, contactors, some compressors. Escalates if refrigerant circuit work and recovery are extensive. |
| Major repair (compressor / HX) | Significant share of unit value | Often the tipping point. Compare to remaining seasons and efficiency loss before approving. |
| Planned RTU changeout | Full capital project | Equipment + curb adapter + crane + electrical/gas + start-up + Title 24 docs. Bundling units lowers per-unit crane cost. |
- • Crane and street permits can rival equipment cost on constrained South Bay roofs.
- • Curb adapters and roofing tie-ins are frequent change-order sources if omitted from bids.
- • After-hours labor premiums for occupied retail and restaurants.
- • Efficiency and comfort gains from modern economizers/controls rarely appear on a repair invoice.
Honest pros & cons
Repair
Pros
- • Lower immediate cash outlay
- • Faster return to service when parts are on hand
- • Preserves capital for worse units on the same roof
Cons
- • Leaves aging efficiency and controls in place
- • Risk of cascading failures within 1–2 seasons
- • May not solve comfort or Title 24 gaps
Replace
Pros
- • New warranty, efficiency, and control platform
- • Opportunity to fix curb, OA, and documentation
- • Fewer emergency callbacks in peak season
Cons
- • Higher upfront cost and longer lead times
- • Crane and tenant coordination complexity
- • Requires capital approval cycles
Failure modes to avoid
Repairing a rusted chassis to “save money”
Money spent on a compressor in a failing cabinet is often wasted within a season.
Replacing without fixing airflow or curb issues
A new RTU on a starved duct or rotten curb inherits the old complaints.
Ignoring refrigerant and parts outlook
A cheap repair on an orphaned platform can strand you mid-failure next summer.
Proof & local context
- • Precision Heating & Cooling provides repair-vs-replace assessments with photos, remaining-life notes, and a clear recommendation — CSLB #1056688.
- • Bryant-authorized changeouts when replacement wins; honest component repairs when it does not.
- • South Bay + Central Valley commercial service since 2000 · Perfection Guaranteed.
Next step
Decision frameworks reflect light-to-mid commercial HVAC, refrigeration, and server/edge cooling across San Jose / South Bay and Central Valley (Hanford, Clovis). Not for hospitals or hyperscale data centers. Site survey and engineered loads beat generic rules of thumb.
FAQs
Is there a rule like “if repair exceeds 50% of replacement, replace”?
It is a useful starting heuristic, not a law. Adjust for age, criticality, efficiency, and whether curb/crane costs make replacement unusually expensive this cycle.
Can you repair now and replace later the same season?
Sometimes — if the bridge repair is cheap and capital is weeks away. We will say when that bridge is rational versus throwing good money after bad.
Do you service non-Bryant RTUs?
Yes for many light commercial brands on service and repair. For new Bryant equipment we install as an authorized dealer; for other brands we discuss parts support and warranty implications honestly.