Review the equipment
We perform the planned maintenance appropriate to the heating or cooling equipment serving the home.
Discovery Bay heating & air services
HVAC Maintenance & Tune-Ups
in Discovery Bay, CA
Arrange heating and cooling maintenance and discuss findings that may need further attention.
Serving Discovery Bay and surrounding communities. Tell our team about the problem or project at your home.
When to get help
Is this the service your home needs?
- Your system is due for scheduled service
- You want to review seasonal equipment operation
- You need to discuss upkeep for the installed system
Our approach
HVAC Maintenance & Tune-Ups for your Discovery Bay property.
Maintenance is planned around the equipment serving your home. We review the system and discuss relevant findings, including conditions that may need diagnosis or repair beyond the maintenance visit. Tell us about any performance changes when booking so they can be considered during the appointment.
Describe the issue and any previous work when arranging your appointment. We explain the findings and proposed scope so you can make an informed decision.
Seasonal system care
Check operation and identify issues early.
Check system operation
We review relevant operating conditions and note items that may need additional diagnosis.
Explain the findings
We discuss maintenance results and clearly separate recommended repair work from the maintenance visit.
Products & Equipment
Equipment options for hvac maintenance & tune-ups
Explore equipment associated with this service. Our team can help determine which options suit your home.
Premium Variable-Speed Cooling for Exceptional Home Comfort
Goodman · GXV9S
The Goodman GXV9S is a premium, high-efficiency variable-speed air conditioner designed to deliver quieter operation, consistent indoor temperatures, and improved comfort throughout the cooling season. Unlike conventional single-stage air conditioners that…
- Adjusts cooling output to match demand, reducing temperature swings
- Provides high-efficiency cooling that can help lower electricity consumption
- Helps reduce outdoor equipment noise
View full product details
The Goodman GXV9S is a premium, high-efficiency variable-speed air conditioner designed to deliver quieter operation, consistent indoor temperatures, and improved comfort throughout the cooling season.
Unlike conventional single-stage air conditioners that operate at full capacity whenever cooling is needed, the GXV9S uses inverter-driven technology to adjust its cooling output based on your home's needs. This allows the system to operate at lower speeds during lighter cooling demands, helping maintain more consistent temperatures while reducing unnecessary energy consumption.
Its variable-speed operation can also improve indoor humidity control when paired with properly matched indoor equipment, helping your home feel more comfortable during warm weather.
The GXV9S features environmentally lower-impact R-32 refrigerant compared with older R-410A systems, a compact side-discharge cabinet, and advanced communicating controls designed to optimize system performance.
At In Demand Plumbing, Heating & Air, we install Goodman variable-speed cooling systems for homeowners who want premium comfort, quieter operation, and long-term energy efficiency.
The result: more precise cooling, fewer noticeable temperature swings, and a more comfortable home.
Additional features
- Longer, lower-speed cooling cycles can improve moisture removal with proper system matching
- Helps maintain consistent indoor comfort
- Up to 19 SEER2 Efficiency
Specifications
- Product Type
- Split-System Air Conditioner
- Efficiency
- Up to 19.2 SEER2
- Refrigerant
- R-32
- Compressor
- Inverter-Driven Variable Speed
- Capacity Range
- 2–5 Tons
- Cabinet Design
- Compact Side-Discharge
- Sound Level
- As low as 45 dBA in quiet mode (model-dependent)
- Controls
- Compatible communicating thermostat required
Warranty information
**Goodman GXV9S Manufacturer Limited Warranty** The Goodman GXV9S offers a 10-Year Unit Replacement Limited Warranty and a 10-Year Parts Limited Warranty, subject to applicable eligibility requirements. Online product registration within 60 days of installation may be required to qualify for enhanced coverage, except where prohibited by state law. Additional compressor replacement coverage may be available through an optional ASURE Extended Service Plan. Warranty coverage, exclusions, registration requirements, and eligibility are governed by Goodman's official warranty certificate. Manufacturer warranty coverage is separate from any installation or workmanship warranty provided by In Demand Plumbing, Heating & Air.
Lennox Signature Premium Gas Heating & Cooling
Lennox · SL25KCV & SLP99VK
Exceptional Cooling. Precise Heating. Complete Home Comfort. Experience premium year-round comfort with the Lennox Signature Gas Heating & Cooling System, featuring the SL25KCV variable-capacity air conditioner and a compatible Lennox Signature gas furnace.…
- Variable-Capacity Cooling — The Lennox SL25KCV adjusts cooling output to maintain consistent indoor temperatures and reduce noticeable temperature swings.
- Variable-Capacity Gas Heating — The Lennox SLP99VK adjusts heating output to provide consistent warmth without frequent full-power cycling.
- Premium Energy Efficiency — High-efficiency cooling and gas heating can help reduce energy consumption compared with older, less efficient systems.
View full product details
Exceptional Cooling. Precise Heating. Complete Home Comfort.
Experience premium year-round comfort with the Lennox Signature Gas Heating & Cooling System, featuring the SL25KCV variable-capacity air conditioner and a compatible Lennox Signature gas furnace.
Unlike conventional heating and cooling systems that operate primarily at full capacity, this advanced system is designed to adjust its output to your home's changing comfort needs.
The SL25KCV delivers high-efficiency cooling with quieter operation and more consistent indoor temperatures. Paired with a Lennox variable-capacity gas furnace, the system provides precise heating during cooler months and variable-speed airflow throughout the home.
Advanced communicating controls help coordinate equipment performance, while properly matched indoor components support improved humidity management and consistent comfort.
Why homeowners choose this system:
- Premium cooling and dependable natural gas heating
- More consistent indoor temperatures
- Quieter operation compared with conventional single-stage equipment
- High-efficiency performance that can help reduce energy consumption
- Improved humidity management with properly matched equipment
- Smart comfort control through a compatible Lennox thermostat
- Professional system sizing, installation, and commissioning
At In Demand Plumbing, Heating & Air, we design heating and cooling installations around the needs of your home, not simply the size of your existing equipment. Premium comfort in every season.
Additional features
- Quiet Heating and Cooling — Variable-capacity operation allows the equipment to run at lower output when full capacity is unnecessary.
- Advanced Humidity Control — Compatible variable-speed indoor airflow helps manage indoor humidity during cooling.
- Precise Comfort Technology — Lennox communicating technology coordinates compatible equipment for more accurate temperature control.
- Lennox S40 Smart Thermostat — Provides connected comfort management and compatible system communication.
- R-454B Refrigerant — Uses refrigerant with a lower global warming potential than R-410A.
- Variable-Speed Airflow — The furnace blower adjusts airflow to support comfort, efficiency, and quieter operation.
- Professional System Matching — Properly matched indoor and outdoor equipment helps deliver reliable performance and certified efficiency.
Specifications
- System Type
- Split-System Air Conditioner with Gas Furnace
- Air Conditioner Model
- Lennox SL25KCV
- Furnace Model
- Lennox SLP99VK
- Air Conditioner Compressor
- Variable Capacity
- Furnace Heating Technology
- Variable-Capacity Gas Heating
- Cooling Efficiency
- Up to 25.10 SEER2, depending on matched equipment
- Furnace Efficiency
- Up to 99% AFUE, depending on model
- Refrigerant
- R-454B
Warranty information
Lennox Signature Collection Manufacturer Limited Warranty The Lennox SL25KCV air conditioner and SLP99VK gas furnace offer manufacturer limited warranty coverage for qualifying residential installations. Eligible Lennox Signature equipment may include up to 10 years of limited coverage on specified components, subject to the applicable model warranty certificate. Additional coverage options may be available through Lennox Warranty Your Way, depending on equipment eligibility, installation date, and applicable terms. Warranty coverage for the air conditioner, furnace, evaporator coil, thermostat, and accessories may differ. All warranties are subject to Lennox's official terms, conditions, and exclusions. Manufacturer warranty coverage is separate from any installation or workmanship warranty provided by In Demand Plumbing, Heating & Air.
Current offers
HVAC Maintenance & Tune-Ups promotions in Discovery Bay
$50 Off HVAC Service of $500 or More
$50 off
Save $50 on qualifying heating and air conditioning services totaling $500 or more with In Demand Plumbing, Heating & Air. Whether you need AC or heating repairs, we're here to help keep your home comfortable.
Offer ends: December 31, 2027
View Terms & Conditions
Valid on qualifying HVAC services with a pre-discount subtotal of $500 or more. $50 discount applies to one qualifying service transaction. Cannot be combined with other offers. Additional restrictions may apply.
$59 AC Tune-Up Special
$59 fixed price
Keep your home comfortable with a professional AC tune-up from In Demand Plumbing, Heating & Air. Schedule your seasonal air conditioning maintenance for just $59 per system.
Offer ends: December 31, 2027
View Terms & Conditions
$59 per AC system. Additional repairs, replacement parts, and services are not included. Cannot be combined with other offers. Valid only in eligible service areas.
5% Senior Discount — Ages 65 & Older
5% off
At In Demand Plumbing, Heating & Air, we appreciate our senior community! Customers aged 65 and older receive 5% off their entire plumbing, heating, or air conditioning job, including labor, materials, and equipment. From everyday repairs to complete system installations, we're proud to help seniors save on home comfort services.
Offer ends: December 31, 2027
View Terms & Conditions
Valid for customers aged 65 or older. Discount applies to the entire job invoice, including labor, materials, and equipment. Proof of age may be required. Cannot be combined with any other offers, coupons, promotions, or discounts.
We install it. We stand behind it.
The In Demand Comfort Guarantee
Our installation guarantees explain how we stand behind eligible equipment installations and respect your home during the work.
Lifetime Labor Guarantee
We stand behind our craftsmanship for the life of the equipment we install.
Comfort Guarantee
If you’re not comfortable with the performance of your new system, we’ll make it right.
No-Surprise Installation Guarantee
The price we agree on is the price you pay. No surprise labor charges.
Property Protection Guarantee
We respect your home like it’s our own. We protect your property and clean our work area when we’re finished.
Installation Quality Guarantee
Done right. Tested right. Explained right. Every system is installed to code, started, tested and walked through with you.
Lifetime Labor Guarantee requirements: Equipment must be installed by In Demand Plumbing, Heating & Air; the Home Protection Plan must remain active without interruption; and required maintenance must be completed as scheduled. Guarantees apply to eligible work and are subject to their full terms.
Read the complete Comfort Guarantee terms →Home protection plans
Maintenance Plans for Year-Round Comfort
Explore ongoing maintenance and member benefits for your home. Choose the coverage that fits your needs.
HVAC Maintenance Plan
$14.95/month
- Two annual visits: heating and cooling
- Standard filter and condenser coil cleaning
- 48-hour priority service
- 10% off repair parts
- 5% off equipment and indoor air quality products
HVAC + Plumbing Maintenance Plan
$24.95/month
- All HVAC Maintenance Plan benefits
- Annual plumbing inspection
- Water quality test
- Tank water heater flush
- Camera inspection of the accessible main line
Plan benefits and services are subject to the applicable membership terms. The Comfort Guarantee and maintenance plan eligibility are not identical.
Your questions
HVAC Maintenance & Tune-Ups questions.
Does a tune-up include every repair the system might need?
No. Maintenance and repairs are different scopes. Findings that require additional work should be discussed before that work proceeds.
How often should HVAC maintenance be scheduled?
Maintenance frequency depends on the equipment and manufacturer guidance. Heating and cooling systems are commonly checked seasonally.
Does maintenance include repairs?
No. Maintenance and repair are separate scopes. Any repair needs identified during the visit should be discussed before additional work proceeds.
Can maintenance prevent every HVAC breakdown?
No. Maintenance can help identify conditions needing attention, but it cannot prevent every future equipment failure.
Should I mention existing comfort problems during maintenance?
Yes. Tell the technician about unusual sounds, cycling, airflow or comfort changes so those symptoms can be considered during the visit.
Do you serve homes outside Discovery Bay?
Yes. Explore our service areas or contact our team about your property address.
Related services
More Discovery Bay heating & air services.
Customer voices
Reviews from our Brentwood location
On Google
★★★★★
Donald Came to my house to serve my AC unit, such a friendly guy, right away it looks like that he knows what he is doing, very professional, he took his time to explain me, and offered me , parts that my unit needs, I totally agree with him, he change the part , and my AC started working right…
Read moreRead less
Donald Came to my house to serve my AC unit, such a friendly guy, right away it looks like that he knows what he is doing, very professional, he took his time to explain me, and offered me , parts that my unit needs, I totally agree with him, he change the part , and my AC started working right away, of course, I feel so happy, I’m totally happy with his service, I thank God for all this, for everything
On Google
★★★★★
Ben came over to help diagnose our AC failure. We had to get a new unit but Ben supplied us with all the info needed to make our best decision. His crew, Joel, Doyle and their helper came the next day and finished the following day. They were very professional, knowledgeable and cleaned up at the…
Read moreRead less
Ben came over to help diagnose our AC failure. We had to get a new unit but Ben supplied us with all the info needed to make our best decision. His crew, Joel, Doyle and their helper came the next day and finished the following day. They were very professional, knowledgeable and cleaned up at the end of everyday. Highly recommend In Demand and their crews.
On Google
★★★★★
Super nice people, very knowledgeable and helpful. Selling my place and didn't try to sell me any unnecessary work
On Google
★★★★★
Donald Came to my house to serve my AC unit, such a friendly guy, right away it looks like that he knows what he is doing, very professional, he took his time to explain me, and offered me parts that my unit needs, I totally agree with him, he change the part , and my AC started working right…
Read moreRead less
Donald Came to my house to serve my AC unit, such a friendly guy, right away it looks like that he knows what he is doing, very professional, he took his time to explain me, and offered me parts that my unit needs, I totally agree with him, he change the part , and my AC started working right away, of course, I feel so happy, I’m totally happy with his service, I thank God for all this, for everything
On Google
★★★★★
Ben came over to help diagnose our AC failure. We had to get a new unit but Ben supplied us with all the info needed to make our best decision. His crew, Joel, Doyle and their helper came the next day and finished the following day. They were very professional, knowledgeable and cleaned up at the…
Read moreRead less
Ben came over to help diagnose our AC failure. We had to get a new unit but Ben supplied us with all the info needed to make our best decision. His crew, Joel, Doyle and their helper came the next day and finished the following day. They were very professional, knowledgeable and cleaned up at the end of everyday. Highly recommend In Demand and their crews.
On Google
★★★★★
Fast, friendly and extremely professional highly recommend recommended!
Awards & recognition
Recognized in Discovery Bay and across the East Bay.
Awards, accreditation and community recognition earned by In Demand Plumbing, Heating & Air.
Nextdoor Neighborhood Fave 2025
Nextdoor
In Demand Plumbing, Heating & Air was recognized as a 2025 Nextdoor Neighborhood Fave.
BBB Accredited Business – A+ Rating
Better Business Bureau
In Demand Plumbing, Heating & Air is a BBB Accredited Business with an A+ rating.
Talk to our team
Get help with hvac maintenance & tune-ups.
Schedule hvac maintenance & tune-ups for your Discovery Bay property or call our team about the problem.