Antioch heating & air services
A heater that will not start, cycles frequently, or produces uneven temperatures needs a careful diagnosis. In Demand Plumbing, Heating & Air provides heating repair services in Antioch.
Serving homeowners across the East Bay with furnace and heating repair for systems that will not start, heat evenly or operate normally.
Local service information
We inspect operating conditions and accessible safety controls before recommending a repair. For Antioch homeowners, the most useful recommendation starts with the condition of the actual system rather than assumptions about the neighborhood. Repair decisions should consider both the fault and the condition of the overall system. We serve homeowners in Dallas Ranch, Prewett Ranch, and other Antioch neighborhoods, with service focused on the actual plumbing or HVAC issue.
Dallas Ranch, Prewett Ranch, and Country Hills are local residential areas or corridors in Antioch. Antioch has older residential streets near Rivertown as well as later subdivisions along the Lone Tree and Deer Valley corridors.
Heating diagnosis checks the equipment and controls to identify the source of poor performance. For appointments near Dallas Ranch and Prewett Ranch, access and existing system condition help determine the appropriate next steps.
When to get help
Our approach
Tell us the heating equipment type and what has changed. We assess the symptoms and accessible system components to guide the diagnosis. Repair options depend on the findings and parts available for the equipment. If the condition raises a replacement question, we explain that option alongside the relevant repair scope.
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.
See our work
Real work from In Demand Plumbing, Heating & Air. Explore actual repairs, installations and other completed projects from our service areas.
Antioch, CA · Local project
The In Demand Plumbing, Heating & Air team participates in hands-on HVAC training to strengthen technician skills in heating and air conditioning diagnostics, equipment servicing, and repair techniques. As furnace tune-up and repair season approaches, our technicians continue sharpening their skills
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Brentwood, CA · Completed project
In Demand Plumbing, Heating & Air completed the installation of a Goodman 4\-ton variable\-speed communicating heat pump paired with a high\-efficiency gas furnace\. The system combines electric heating and cooling with gas heating for year\-round home comfort\.
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Pittsburg, CA · Completed project
In Demand Plumbing, Heating & Air installed a single-stage heat pump system with a matching indoor air handler and a whole-home air scrubber for year-round heating, cooling, and indoor air quality.
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Diagnose the heating problem
Share whether the furnace will not start, cycles unexpectedly, produces inconsistent heat or displays an error.
We evaluate the equipment and operating conditions to determine the source of the problem.
We explain the repair scope and discuss replacement when equipment condition makes it relevant.
Products & Equipment
Discover how the right equipment can improve comfort, efficiency, and everyday life at home. We'll help you compare options suited to your property.
Lennox · SLP99V
Tired of uneven temperatures, noisy heating cycles, or a furnace that constantly turns on and off? The Lennox SLP99V Gas Furnace is designed to deliver quieter, more consistent warmth while…
Variable-Capacity Heating
Automatically adjusts heat output to better match your home's heating demand, reducing large temperature swings.
Up to 99% AFUE Efficiency
Converts nearly all the fuel's energy into usable heat under standardized testing conditions, potentially reducing gas consumption compared with older furnaces.
Variable-Speed Blower Motor
Adjusts airflow to help distribute heat evenly while supporting quieter operation.
Tired of uneven temperatures, noisy heating cycles, or a furnace that constantly turns on and off? The Lennox SLP99V Gas Furnace is designed to deliver quieter, more consistent warmth while using fuel efficiently. Part of the Dave Lennox Signature Collection, the SLP99V is a premium variable-capacity gas furnace with efficiency ratings up to 99% AFUE. That means up to 99% of the fuel's energy is converted into usable heat under standardized testing conditions, helping reduce wasted energy compared with many older, lower-efficiency furnaces. Unlike traditional single-stage furnaces that operate at full heating output whenever they turn on, the SLP99V can adjust its heat output in small increments to match your home's changing heating needs. Its variable-speed blower also adjusts airflow to help maintain more even temperatures and quieter operation. When paired with compatible Lennox communicating controls and cooling equipment, the furnace can support advanced comfort features, humidity management, and coordinated heating and cooling operation. The SLP99V is especially appealing for homeowners replacing an aging gas furnace who prioritize comfort, quiet performance, and long-term heating efficiency. Installation requirements, equipment compatibility, and the cost of upgrading should be considered before selecting this premium model. In Demand Plumbing, Heating & Air can evaluate your existing heating system, determine the proper furnace size, and professionally install and configure the Lennox SLP99V for your home's heating needs.
Lennox lists warranty coverage for eligible SLP99V furnaces under its Dave Lennox Signature Collection warranty program. - Covered components: Up to 10 years of parts coverage under the applicable warranty program. - Heat exchanger: 20-year or limited lifetime coverage, depending on the exact model and warranty terms. - Warranty Your Way: Eligible homeowners may choose the default 10-year parts-only coverage or an alternative combining 3 years of labor coverage with 7 years of parts coverage. Eligibility, registration, exclusions, and warranty selection conditions apply. Verify the exact warranty certificate for the installed furnace.
Lennox · iComfort S40
Imagine walking into a home that's already at your ideal temperature, without constantly adjusting the thermostat. The Lennox iComfort S40 Ultra Smart Programmable Thermostat makes managing…
7-Inch HD Color Touchscreen
Large, easy-to-read display makes adjusting temperatures, schedules, humidity settings, and comfort preferences simple.
Smart Away Technology
Uses smartphone location information to automatically adjust temperatures when household members leave or return.
Schedule IQ Technology
Adapts heating and cooling schedules to changing household routines for convenient comfort management.
Imagine walking into a home that's already at your ideal temperature, without constantly adjusting the thermostat. The Lennox iComfort S40 Ultra Smart Programmable Thermostat makes managing your home's heating and cooling easier with intelligent controls, personalized comfort settings, and convenient access from almost anywhere. Featuring a sleek color touchscreen, the iComfort S40 allows you to create heating and cooling schedules that fit your daily routine. Whether you're heading to work, returning home, or getting ready for bed, your thermostat can help maintain comfortable temperatures while reducing unnecessary system operation. What makes the iComfort S40 different from many conventional smart thermostats is its ability to communicate with compatible Lennox HVAC equipment. Instead of simply switching heating and cooling on or off, it can coordinate with supported variable-capacity and multi-stage systems for more precise temperature control. The thermostat also supports remote adjustments through the Lennox Home App, compatible voice assistants, and advanced indoor air quality management when paired with qualifying accessories. For homeowners upgrading to a compatible Lennox heating and cooling system, the iComfort S40 can serve as the central control for year-round comfort. In Demand Plumbing, Heating & Air can evaluate compatibility, professionally install the thermostat, configure its settings, and help you get the most from your Lennox comfort system.
Manufacturer Warranty: Lennox advertises a 10-year limited warranty for the S40 Smart Thermostat. Coverage is subject to the applicable Lennox warranty terms, including eligibility, exclusions, and any registration requirements. These conditions should be confirmed before publishing.
Little Firefighter
Automatic Gas Shutoff Protection When an Earthquake Strikes
Automatically interrupts gas flow when qualifying seismic shaking occurs
Does not depend on household electricity
Helps limit continued gas supply to downstream piping after activation
Automatic Gas Shutoff Protection When an Earthquake Strikes
At In Demand Plumbing, Heating & Air, we believe a new heating system should be installed with safety in mind. That's why we install Little Firefighter earthquake-activated gas shutoff valves when required by applicable codes or appropriate for the installation.
During a significant earthquake, damaged gas piping and connections can create dangerous gas leaks. A Little Firefighter seismic gas shutoff valve is designed to automatically stop gas flow when earthquake shaking reaches its activation threshold, helping reduce the risk of continued gas flow through damaged downstream piping.
Unlike a manually operated gas shutoff valve, this safety device works automatically and does not require electricity or homeowner intervention to activate.
Why homeowners benefit:
Our technicians install gas safety equipment as part of a properly planned heating system installation, helping protect your home beyond everyday heating and cooling performance.
Because a quality HVAC installation isn't just about comfort. It's also about protecting your home and family.
Current offers
$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
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.
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
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.
5% off
In Demand Plumbing, Heating & Air proudly offers a 5% military discount to active-duty military members and veterans as a thank-you for their service. Save 5% on your entire plumbing, heating, or air conditioning job, including labor, materials, and equipment.
Offer ends: December 31, 2027
Valid for active-duty military members and veterans. Discount applies to the entire job invoice, including labor, materials, and equipment. Proof of military service or veteran status may be required. Cannot be combined with any other offers, coupons, promotions, or discounts.
We install it. We stand behind it.
Our installation guarantees explain how we stand behind eligible equipment installations and respect your home during the work.
We stand behind our craftsmanship for the life of the equipment we install.
If you’re not comfortable with the performance of your new system, we’ll make it right.
The price we agree on is the price you pay. No surprise labor charges.
We respect your home like it’s our own. We protect your property and clean our work area when we’re finished.
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
Explore ongoing maintenance and member benefits for your home. Choose the coverage that fits your needs.
$14.95/month
$24.95/month
Plan benefits and services are subject to the applicable membership terms. The Comfort Guarantee and maintenance plan eligibility are not identical.
Your questions
Describe what the equipment does, any displayed messages and whether the issue affects the whole home. Mention when the problem began and any recent service work.
Several equipment and airflow conditions can cause poor heating. Diagnosis is needed before identifying the repair.
Unexpected cycling can have several causes. We assess the equipment and operating conditions to narrow down the problem.
That depends on the diagnosis, equipment condition, available repairs and the cost and benefits of replacement.
Equipment type, displayed error messages, when the problem started and whether it affects the whole home are useful details.
Yes. Explore our service areas or contact our team about your property address.
Related services
Customer voices
★★★★★
I had an excellent experience with In Demand Plumbing, Heating & Air, especially Ezequiel and Donald. Ezequiel was professional, patient, knowledgeable and reassuring from the moment he arrived. I was dealing with a very stressful water-damage situation, and he took the time to listen as I…
I had an excellent experience with In Demand Plumbing, Heating & Air, especially Ezequiel and Donald. Ezequiel was professional, patient, knowledgeable and reassuring from the moment he arrived. I was dealing with a very stressful water-damage situation, and he took the time to listen as I explained what I had observed. He quickly identified the source of the problem—a broken toilet supply line upstairs that had caused significant water damage. He clearly explained what happened, completed the repair, restored the water and thoroughly tested everything to make sure there were no additional leaks. I especially appreciated Ezequiel’s communication and the time he took to discuss prevention, including recommending a Moen Flo system to help detect and mitigate potential water issues in the future. Donald, the HVAC technician, was also extremely helpful. He checked the HVAC system while they were there at no additional charge and made such a positive impression that I scheduled an appointment with him for next week to follow up on the system. Excellent customer service all around. Both Ezequiel and Donald made a stressful situation much easier to manage through their professionalism, knowledge and kindness. I would absolutely recommend In Demand Plumbing, Heating & Air.
★★★★★
Tech showed up on time. Very professional yet also friendly. He did the work and showed us pictures of our AC unit. Expressed what was working well, and what could be improved. Excellent service
★★★★★
We had a great experience with In Demand Plumbing! Jesse came to our house to help with our plumbing needs and was quick, efficient, and professional. Don also came out for an HVAC checkup and was extremely thorough and communicative. He took the time to explain everything clearly and made sure we…
We had a great experience with In Demand Plumbing! Jesse came to our house to help with our plumbing needs and was quick, efficient, and professional. Don also came out for an HVAC checkup and was extremely thorough and communicative. He took the time to explain everything clearly and made sure we understood his findings and recommendations. Both Jesse and Don arrived on time and provided excellent service. We really appreciated their professionalism and would definitely recommend In Demand Plumbing!
★★★★★
Ben deserves 10 stars, but You only have room for 5. He was so good to take time to explain every thing He did so now I have a good idea of how the heater and A.C. work. He also knows how to explain things so a 92 year old can understand just how things work. He deserves a BIG RAISE.
★★★★★
Of course, when it's one of the hottest days of the year, the A/C will act up. I called and Jasmin got Don (Don the HVAC guy) out here first thing the next morning. We have used In Demand years ago for our plumbing needs and now will use them for our HVAC needs. Don was very thorough and explained…
Of course, when it's one of the hottest days of the year, the A/C will act up. I called and Jasmin got Don (Don the HVAC guy) out here first thing the next morning. We have used In Demand years ago for our plumbing needs and now will use them for our HVAC needs. Don was very thorough and explained everything that he did to get our archaic A/C going again. It is a gift to find a company that does business "old school". Showing up on time, being knowledgeable and answering questions as well as a positive attitude. Don is the type of service person you want in your home.
★★★★★
Great work from Bento whose come to our house twice now for plumbing and Donald for HVAC support. Both have been patient, explained the work they were doing and called before hand so as to not wake my napping toddler.
Awards & recognition
Awards, accreditation and community recognition earned by In Demand Plumbing, Heating & Air.
Nextdoor
In Demand Plumbing, Heating & Air was recognized as a 2025 Nextdoor Neighborhood Fave.
Better Business Bureau
In Demand Plumbing, Heating & Air is a BBB Accredited Business with an A+ rating.
Talk to our team
Schedule heating repair for your Antioch property or call our team about the problem.
