Combined HVAC Tune-Up in Salt Lake County

April 22, 2024. A first-time customer named Carla Mendoza in Murray called us for a “general HVAC check-up” because she’d just bought a 1987 split-level home and didn’t know the equipment service history. The previous owner had been an absentee landlord; no records existed. Carla wanted to know what she was dealing with before her first heating season in the home and before AC demand started in late spring. This is the textbook scenario for combined HVAC tune-up — equipment of unknown history, before peak demand season, with the homeowner wanting comprehensive verification rather than reactive emergency response. Marcus Halverson performed the spring AC tune-up first (the more time-sensitive given approaching cooling demand) and then the fall furnace tune-up while still on-site, billing as a combined service. Findings: the 2011 Carrier Performance 13 AC was operating correctly with refrigerant slightly low (added 8 oz R-22, returning to manufacturer spec), capacitor was 6.2 microfarads vs. nameplate 7.5 (replaced, $185), evaporator coil was clean. The 2007 Trane XL80 furnace was operating with elevated CO at 142 ppm air-free (combustion analysis confirmed); flame sensor was severely fouled (cleaned, brought CO to 36 ppm and combustion efficiency back to nameplate); heat exchanger borescope inspection found no cracks at 17 years of age (notable durability for that platform). Total visit: 2 hours and 35 minutes on-site, $245 combined package price, plus $185 capacitor (covered by 15% Comfort Care plan discount that Carla added at the visit). Carla now knew exactly what she had, what was working, what needed adjustment, and what to expect as both systems aged further. She enrolled in Comfort Care for ongoing service and replacement planning over the next 5-7 years.

Combined HVAC tune-up is the service we provide when a customer wants both their AC and furnace inspected during the same visit — typically as the equipment ages, when transitioning between seasons, or after purchasing a home with unknown service history. The standard approach is to perform both tune-up checklists (19-point AC + 19-point furnace from the dedicated AC tune-up and furnace tune-up pages) during a single 2-3 hour visit. The combined service is offered as a package ($245 vs. $258 for two separate visits) primarily because the on-site time per tune-up drops when both are performed sequentially — we don’t need to verify customer presence twice, perform equipment access setup twice, or coordinate scheduling for two separate visits. The savings get passed to the customer. This page covers when combined tune-up is the right approach, what’s included, and how it differs from the separate seasonal visits that most customers do.

When Combined Tune-Up Makes Sense

New homeowner with unknown service history.

The Carla Mendoza scenario above. Combined tune-up establishes baseline operating data on both systems before either becomes a problem. Useful for households moving into homes that have been rentals, vacant properties, or owned by elderly previous occupants whose service records aren’t available.

Pre-purchase home inspection enhancement.

Standard home inspection reports often note HVAC equipment present but don’t include combustion analysis, refrigerant checking, or borescope heat exchanger inspection. Combined tune-up during the inspection period provides quantitative data about equipment condition for the purchase decision. Inspector reports can identify obvious problems; tune-up identifies operational reality.

Pre-sale property preparation.

Sellers preparing to list a home benefit from documented recent HVAC tune-up showing equipment is operating to specification. Buyers see “AC and furnace serviced [recent date]” as a value indicator; written tune-up reports provide credibility. Common request from real estate agents as part of “showing-ready” property preparation.

Equipment approaching end of expected service life.

For homes with both AC and furnace at 12-18 years of age, combined tune-up provides comprehensive view of both systems’ condition. Decision support for replacement timing: replace both together (often economic), stagger replacements (sometimes warranted), or continue maintenance on existing equipment (also sometimes appropriate). Written tune-up findings inform the strategic decision.

Transition between seasons (spring or fall).

The shoulder seasons (April-May, September-October) are when many customers schedule combined service. Either system might still be running occasionally; neither is in peak demand. Equipment is more accessible (not cycling for emergency dispatch); technician scheduling is more flexible.

After major work on either system.

If you just had your furnace replaced or your AC repaired, combined tune-up on the unchanged system verifies that the work didn’t inadvertently affect other equipment. Sometimes new installation work shifts static pressure, changes airflow, or alters duct conditions that affect the other system. Combined tune-up catches these interactions.

Comfort Care plan members for first visit.

New Comfort Care plan members get combined tune-up as their initial baseline. Subsequent visits split into seasonal (spring AC, fall furnace) for ongoing maintenance.

When Separate Visits Are Better

• Established customer with healthy equipment. For ongoing maintenance on equipment that’s running well, separate seasonal visits are the standard approach. Each visit happens close to peak demand for that system, ensuring the most recent service is fresh going into demand season.
• Specific complaint or symptom on one system. If your AC is making unusual noise but your furnace is fine, schedule an AC diagnostic visit rather than combined tune-up. The combined approach is appropriate when both systems need attention.
• Heat pump systems. Heat pumps don’t have separate AC and heating equipment — they’re integrated. Single tune-up covers the equipment year-round. See the heat pumps page for heat-pump-specific service approach.
• Budget timing constraints. If $245 in a single month strains the budget, two $129 visits at different times of year may be easier to absorb. Plan members spread the cost over the annual plan.

What’s Included in Combined HVAC Tune-Up

Both the AC tune-up and furnace tune-up checklists are completed during the combined visit. Below is the integrated 38-point scope:

Cooling System Inspection (19 points)

Refrigerant operation:

• Outdoor unit refrigerant pressure measurement (suction and liquid line pressures)
• Subcooling measurement vs. manufacturer spec (typical 8-12°F for residential R-410A)
• Superheat measurement at evaporator outlet (typical 8-12°F)
• Refrigerant level verification; adjustment if needed (with proper recovery and recharge tools)

Air handler / blower:

• Blower motor amperage measurement vs. nameplate FLA
• Blower wheel cleanliness inspection
• Blower capacitor microfarad measurement
• ECM blower diagnostic (manufacturer protocol) if applicable

Evaporator coil:

• Coil cleanliness inspection (visible portion)
• Drain pan inspection and cleaning
• Condensate drain line clearing and flow verification
• Float switch operation test

Condenser unit:

• Condenser coil cleaning (cleanup of debris, foliage)
• Compressor amperage measurement and verification against nameplate
• Contactor visual inspection (pitting, burning indicates replacement need)
• Compressor capacitor microfarad measurement
• Disconnect electrical inspection

Controls and safety:

• Thermostat calibration check
• Low-voltage wiring inspection
• Compressor lockout circuit test

Heating System Inspection (19 points)

Combustion safety:

• Carbon monoxide ambient measurement (must be under 9 ppm in living areas)
• Combustion analysis with Testo 320 (CO under 100 ppm air-free, O₂ 5-10%, CO₂ 8-11%, flue gas temp appropriate for equipment)
• Draft pressure verification with manometer
• Heat exchanger borescope inspection (on equipment older than 10 years)
• Flame characteristic visual inspection during operation
• Gas pressure at inlet to gas valve
• Manifold pressure verification (altitude-derated per IFGC Section 304.1 for Salt Lake’s 4,226 ft elevation = ~16.9% reduction from sea-level spec)

Mechanical components:

• Hot surface igniter resistance test (silicon nitride 40-90 ohms healthy)
• Flame sensor microamp reading (2-6 µA healthy)
• Inducer motor amperage
• Pressure switch contact verification
• Blower motor amperage and bearing condition
• Capacitor microfarad measurement
• Total external static pressure (compared against manufacturer max, typically 0.50″ WC)
• Filter inspection and replacement

Controls and safety:

• Thermostat calibration check
• Limit switch operation test (high-limit and rollout)
• Condensate drain verification (condensing equipment)
• Written tune-up report with measurements

Integrated Documentation

Combined written report:

All measurements from both systems documented in single report. Photos of any findings warranting attention. AHRI certificate references for equipment serial numbers. Recommended follow-up actions if any. Delivered electronically within 24 hours of visit or printed at time of visit if preferred.

Equipment service history.

Both systems’ service history added to our records. Future visits can reference baseline measurements from this visit to track equipment changes over time. Useful when warranty issues arise (manufacturer often requires documented service history for warranty claims).

Customer walkthrough.

Technician explains findings from both systems before leaving. Specific recommendations for any immediate action items. Discussion of longer-term equipment replacement planning if equipment is approaching end of expected service life.

How the Visit Actually Works

1. Scheduling (90-180 minute window). Combined HVAC tune-up takes 2-3 hours typical, longer for older systems requiring detailed inspection or units with multiple components. We schedule the window with you and confirm 24 hours in advance.
2. Arrival and initial walkthrough. Technician arrives, introduces themselves, confirms scope (combined tune-up vs. specific concerns), and walks through to identify both indoor equipment (furnace, air handler, thermostat) and outdoor equipment (condenser) locations.
3. AC tune-up first (typical sequence). Starting with the cooling system because: AC tune-up requires outdoor conditions warm enough to run the equipment in cooling mode (typically 60°F+ outdoor); refrigerant pressure measurements take time to stabilize so starting earlier helps; condenser cleaning is the most disruptive part of the visit (water, hose, debris) and best to complete first.
4. Furnace tune-up second. While AC measurements stabilize, technician begins furnace tune-up. Combustion analysis requires the equipment to fire, so this typically happens during cool morning periods. The borescope heat exchanger inspection takes 8-15 minutes per furnace; it’s the time-intensive portion of fall service.
5. Integrated findings discussion. Both systems’ measurements compiled, technician explains overall condition. Any findings warranting repair are explained with cost estimates. Discussion of both systems’ age and remaining service life expectations.
6. Documentation delivery. Combined written report sent within 24 hours. Includes all 38 measurement points plus photos and recommendations.
7. Follow-up action. If repairs are needed, scheduling them immediately. If everything is operating normally, the next year’s seasonal visit is pre-scheduled (typically split into separate spring AC + fall furnace for ongoing service).

Pricing Reference (Q2 2026)

Combined HVAC tune-up (single visit):

$245 includes both AC and furnace tune-ups. Saves $13 vs. two separate $129 visits.

Multi-system households:

Each additional system $189 (combined tune-up for the second system). Common configurations: separate upstairs/downstairs systems in larger homes, separate primary residence + ADU, separate residential + light commercial.

Comfort Care plan ($189/year per system):

Includes both visits (spring AC + fall furnace) annually, plus 15% off any repairs, plus priority dispatch, plus waived after-hours fee. Most cost-effective approach for households planning to keep equipment 5+ years.

Premium Care plan ($295/year per system):

All Comfort Care benefits plus 20% repair discount, free service calls for first 4 dispatches, free filter upgrade to MERV 11 or MERV 13 media, free annual IAQ measurement, 1-hour priority dispatch.

Common add-on costs (during tune-up visit):

• Refrigerant addition (R-410A, R-454B, R-22 where applicable): $35-$65 per ounce installed
• Capacitor replacement: $185-$285 each (compressor capacitor higher; blower capacitor lower)
• Contactor replacement: $185-$245
• Drain pan or drain line clearing: $85-$185
• Flame sensor cleaning or replacement: $85-$165
• Igniter replacement: $185-$245
• Air filter (if not on subscription): $25-$85 depending on type and size
• Humidifier water panel: $45-$85 installed

Comfort Care discount on add-ons:

15% off all parts and labor for plan members during tune-up visit.

Combined vs. Seasonal Approach — Cost Comparison

The pricing is structured so the seasonal split is slightly more expensive (rewarding the customer’s preference for cost-effective bundling). Comfort Care plan is the lowest-cost option for most households over the long term, especially when any repairs come up during the year.

Common Questions

Is the quality the same on combined vs. separate visits?

Yes — identical 38-point checklist, identical measurement protocols, identical documentation. The combined visit just saves the duplicated setup time (parking, customer greeting, equipment access setup). Technician completes both checklists in their entirety.

When should I get combined service vs. seasonal split?

Combined makes sense for: new homeowners with unknown history, pre-sale property preparation, equipment approaching end of life, shoulder-season scheduling preference. Seasonal split makes sense for: ongoing maintenance on healthy equipment, customers who prefer the service done close to peak demand, customers managing budget timing.

What if I have heat pump equipment instead of separate AC + furnace?

Heat pumps are integrated systems with combined heating/cooling functions. They get one tune-up per year typically (we recommend spring for most systems), with a 19-point checklist that’s hybrid between AC and furnace approaches. See the heat pumps page for heat-pump-specific tune-up scope. Pricing same as single-system tune-up ($129) or included in Comfort Care plan.

Should I do combined tune-up before selling my house?

Often yes, particularly if your equipment is more than 8-10 years old. Buyers and their home inspectors look for HVAC service documentation; recent combined tune-up showing equipment operating to specification is a positive signal. Cost ($245) usually pays for itself in faster sale process or sustained asking price. Real estate agents frequently recommend this proactive step.

What if you find problems during the tune-up?

We document findings with measurements, explain implications, and provide written repair quotes. You decide on action. Minor issues can be addressed during the tune-up visit (capacitor replacement, drain clearing, refrigerant top-off, filter replacement); major issues are scheduled separately. Safety-critical findings (cracked heat exchanger, severe combustion problems, refrigerant system contamination) require equipment shutdown until resolved; we explain implications and provide both repair and replacement quotes.

Frequently Asked Questions

How long does combined HVAC tune-up take?

2-3 hours typical for residential single-system home with both AC and furnace inspected. Multi-system homes scale longer (additional 1-2 hours per additional system). Equipment access difficulty (attic furnaces, multiple-floor split systems, restricted equipment rooms) can extend visit duration.

Do I need to be home during the tune-up?

Preferred but not required. Many customers leave a key or garage code and let us perform the work while they’re at the office. The findings discussion can happen by phone after the visit completes, with written report delivered electronically. Comfort Care plan members who use this approach establish standing arrangements for ongoing visits.

What’s the best season for combined tune-up?

April-May (spring) or September-October (fall). Spring works well for AC commissioning before cooling demand and furnace inspection while it’s still warm enough for diagnostic work. Fall works well for furnace verification before heating demand and AC end-of-season verification. Avoid peak summer (July-August) and peak winter (December-February) when emergency dispatch dominates technician schedules.

Can I get combined tune-up done on a Saturday?

Yes, weekend appointments are available with a $35-$65 weekend service fee on top of the standard tune-up price. Comfort Care plan members get weekend availability without additional fee.

Does combined tune-up reset the calendar on my next service?

Yes. After combined tune-up, the next service typically scheduled 11-13 months later (depending on equipment age and complaint history). Comfort Care plan members are automatically scheduled for their next visit on plan anniversary.

Schedule Your Combined HVAC Tune-Up

Best season is shoulder season (April-May or September-October). Scheduling typically 1-3 weeks lead time during off-peak periods.

• Phone: (385) 300-1867
• Address: 756 E Winchester St #322, Salt Lake City, UT 84107
• Email: info@saltlakecityheatingairconditioning.xyz
• Utah DOPL HVAC Contractor License: #11567823-5501
• EPA Section 608 Universal (Lead Tech): #608U-2009-447129

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