Emergency HVAC from a Licensed Silicon Valley HVAC Contractor
Our dispatch protocol triages calls by severity in the first 60 seconds. Tier 1 — life safety: CO alarm activation, gas leak smell, smoke from equipment, electrical burning odor. These get the next available tech regardless of queue position and we walk the caller through immediate shutdown steps (gas valve off, breaker off, evacuate, ventilate) while the truck is en route. Tier 2 — habitability: no heat below 45°F outside, no cooling above 95°F with vulnerable occupants (infants under 12 months, residents over 70, anyone with documented respiratory or cardiac conditions). Tier 3 — urgent comfort: no heat or cooling without vulnerable occupants. We are transparent about the queue: if you are Tier 3 at 11 PM and someone Tier 1 calls, we will tell you the new ETA.
After-hours pricing in our service area runs 1.25x standard rate for weekday evenings (6 PM-10 PM) and Saturdays, and 1.5x for overnight (10 PM-6 AM), Sundays, and the seven major holidays (New Year's, MLK, Memorial Day, July 4th, Labor Day, Thanksgiving, Christmas). The diagnostic fee on emergency calls is $189 vs $89 standard — waived if the repair is approved on the spot. Common emergency repairs: hot surface igniter $280-$420 after-hours, capacitor replacement $240-$480, condensate pump $320-$520, gas valve replacement $480-$850. We provide written flat-rate quotes before touching anything, even at 3 AM. No surprise time-and-materials billing.
Carbon monoxide calls are our most serious dispatch class. CO is colorless, odorless, and produces symptoms (headache, dizziness, nausea) that occupants often misattribute to flu. PG&E's CO incident data shows the Bay Area averages 800-1,100 confirmed residential CO exposure events per year. Our protocol: telephone-triaged shutdown of the suspected source, immediate ventilation (open windows, run kitchen and bath exhaust), occupant evacuation if alarm reads above 35 ppm, and dispatch with a Bacharach Fyrite InTech or Testo 320 analyzer. We measure CO at the burner, in the flue, at supply registers, and ambient living-space ppm. Cracked heat exchangers are the most common root cause we find — about 40% of confirmed CO calls involve heat exchanger failure on furnaces 12+ years old.
Refrigerant emergencies are increasing as the R-410A phase-down accelerates. The 2024 AIM Act stepwise reduction made R-410A virgin pricing jump from roughly $9/lb in 2022 to $25-$45/lb in 2025, and many distributors are rationing supply. Systems leaking R-410A in 2026 face a different decision tree than they did three years ago. Newer equipment shipping with R-32 (Daikin Fit, some Mitsubishi lines) and R-454B (Carrier Infinity, Lennox SL18XC1) is mildly flammable (A2L classification) and requires updated leak-handling protocols, gas detection equipment, and ignition-source clearance. Our techs hold EPA Section 608 universal certification plus A2L-specific training. We never simply top off a leaking system — we repair the leak, pull a 500-micron vacuum, and weigh in the manufacturer-spec charge with a digital scale.
What's Included in Every Emergency HVAC Job
- 24/7/365 dispatch with live operator (no automated phone tree at 2 AM)
- Tier 1 life-safety calls prioritized over all queue position
- Bacharach or Testo combustion analyzer on every gas-emergency dispatch
- EPA Section 608 universal-certified refrigerant handling including A2L (R-32, R-454B)
- Stocked truck with capacitors, igniters, contactors, flame sensors, condensate pumps
- Written flat-rate quote before any work begins, even at 3 AM
- Frozen pipe risk assessment on no-heat calls below 35°F outside
- Photo documentation and combustion readings on every invoice
- 1-year labor warranty on emergency repairs (same as standard service)
Common Emergency HVAC Issues We Resolve
CO alarm sounding repeatedly
Cause: Cracked heat exchanger, blocked flue, backdrafting from kitchen exhaust competing with B-vent furnace, or aged water heater venting into shared flue
Fix: Immediate furnace shutdown, full combustion analysis, borescope heat exchanger inspection — if cracked, replacement consult; if backdrafting, vent isolation. Typical response under 1 hour.
Smell of natural gas near furnace
Cause: Loose union fitting, corroded gas valve, damaged flexible connector, or sometimes a cracked heat exchanger releasing unburned gas during ignition
Fix: STOP — shut gas valve, evacuate, call PG&E (800-743-5000) for the smell, then us for the equipment. We pressure-test gas piping with a manometer, leak-soap every joint, and replace failed components.
Heater smell that is NOT gas (burning dust, plastic, electrical)
Cause: Dust burnoff on first heat call of season (normal first 15 minutes), failing blower motor windings, or melting wire insulation on bad terminals
Fix: Distinguishable: gas smell is sulfur/rotten-egg (mercaptan additive); dust burnoff is faint and clears in 20 minutes; electrical burn is acrid and persists. Persistent acrid smell = shut down, call us.
No heat with outside temp below 35°F
Cause: Hot surface igniter failure, flame sensor fouling, inducer motor failure, condensate trap freeze on 95% AFUE units, or thermostat communication loss
Fix: Frozen pipe risk rises rapidly below 32°F outdoor — we prioritize these. Diagnostic typically under 30 minutes; most resolved with truck-stock parts. Dispatch in 1-3 hours Peninsula.
Refrigerant line frosted solid, AC not cooling
Cause: Severe refrigerant undercharge from a leak, restricted airflow icing the evap, or stuck reversing valve (heat pumps)
Fix: System off, allow thaw 4-8 hours, then leak detection with Inficon Tek-Mate, leak repair, vacuum, and weighed-in charge. Continued operation damages the compressor — a $2,400-$3,800 part.
Water pouring from indoor unit ceiling
Cause: Clogged condensate drain with secondary float switch failed or absent, cracked drain pan, or condensate pump motor failure
Fix: Immediate shutdown, wet-vac drain clear, P-trap repair or installation, secondary float switch installation if missing — typical $280-$650 emergency rate.
Loud bang from furnace at startup
Cause: Delayed ignition: gas pools in combustion chamber before ignition source fires, then ignites all at once. Caused by dirty burners, low gas pressure, or partial gas valve failure.
Fix: NOT optional repair — repeated delayed ignition can crack the heat exchanger. Burner cleaning, gas pressure verification at manometer, valve replacement if needed.
Our Emergency HVAC Process
Live Operator Triage
Call our 24/7 line and reach a person — not a phone tree. Operator triages severity (Tier 1-3), confirms address, walks you through immediate safety steps if needed.
Tech Dispatch
Truck rolls within 15-30 minutes of call. Peninsula ETA 1-3 hours, Alameda County 2-4 hours. We text you the tech's name, photo, and live ETA.
On-Site Safety + Diagnosis
Combustion analysis, gas leak check, electrical sequence test, refrigerant pressures as applicable. Root cause identified, written flat-rate quote presented.
Repair or Make-Safe
Approved repair completed with truck-stock parts when possible. If parts unavailable at 2 AM, we make the system safe (gas off, breaker locked) and return at first parts-house opening.
Verification + Documentation
Multi-cycle test, final combustion readings, gas leak verification, photo documentation. Invoice with all readings and a callback number for any 24-hour follow-up concerns.
Emergency HVAC Pricing in the Bay Area
Typical emergency hvac pricing in our Silicon Valley service area runs $189 – $2 400 per emergency call. Most jobs complete in 1-3 hours response Peninsula; 2-4 hours Alameda; repair 1-3 hours typical.
Every quote is flat-rate and provided in writing before work begins. Diagnostic fees are waived when repair is approved. We never use time-and-materials billing surprise pricing.
Local Context: Emergency HVAC in Silicon Valley
Bay Area emergency HVAC demand spikes in three windows: late December through early February for no-heat calls (interior valley overnight lows hit 28-35°F), September heat dome events for AC failures (interior 95-105°F), and the first cold snap of fall when furnaces fire for the first time after sitting idle for 7+ months — that is when failed igniters and seized blower motors surface. Climate Zone 3 (coastal) sees milder events but more marine-layer mold; Climate Zone 4 (south coast / interior) sees harder temperature extremes. PG&E G-1 residential gas rates ($1.85-$2.40/therm baseline 2025) make extended runtime during equipment problems expensive — a furnace short-cycling for two days can add $40-$80 to a monthly bill. SVCE and PCE customers occasionally see grid-emergency time-of-use spikes that stack with HVAC issues. Older homes in Old Palo Alto, Crescent Park, and Atherton estates sometimes have antique gravity furnaces or boilers that require specialized parts sourcing — we partner with R.E. Michel and Geary Pacific for after-hours OEM access.
HVAC Brands We Service for Emergency HVAC
Emergency HVAC FAQ
What counts as an HVAC emergency vs a next-day call?
True emergency (call us now, any hour): CO alarm activation, gas smell, smoke or burning odor from equipment, no heat with outdoor temp under 40°F, no cooling with indoor temp over 85°F and vulnerable occupants (infants, elderly, medical conditions), water actively flooding from equipment, refrigerant lines fully frosted. Next-day acceptable: cooling weak but functional, intermittent thermostat issues, minor noises, scheduled maintenance overdue. When in doubt, call — our operator triages free.
How fast can you actually be at my house at 2 AM?
Peninsula cities (Palo Alto, Menlo Park, Atherton, Mountain View, Los Altos, Sunnyvale, Cupertino, Saratoga, Los Gatos, San Jose west of 880, Redwood City, San Carlos, Belmont, San Mateo, Burlingame, Hillsborough): typical 1-3 hours after-hours. Alameda County (Fremont, Newark, Union City, Hayward): 2-4 hours. South County (Morgan Hill, Gilroy): 2-4 hours. Tier 1 life-safety calls jump the queue — we drop other work for CO and gas calls.
How much does after-hours emergency service cost?
Diagnostic fee $189 (waived if repair approved). After-hours rate multipliers: 1.25x for weekday evenings (6 PM-10 PM) and Saturdays, 1.5x for overnight (10 PM-6 AM), Sundays, and seven major holidays. Common emergency repairs after-hours: igniter $280-$420, capacitor $240-$480, contactor $260-$420, condensate pump $320-$520, flame sensor $220-$340, gas valve $480-$850. Always flat-rate written quote before work begins.
My CO alarm is going off — what do I do RIGHT NOW?
First: get everyone outside or to a window with fresh air. Second: shut off the furnace at the thermostat AND the gas valve at the furnace if you can do it safely. Third: do NOT go back inside to "check things." Fourth: call 911 if anyone has symptoms (headache, confusion, dizziness, nausea). Fifth: call PG&E at 800-743-5000. Sixth: call us — we dispatch immediately with a Bacharach combustion analyzer and a borescope. Do not re-enter the home until levels are confirmed under 9 ppm in living space.
How do I tell a real gas leak from "just heater smell"?
Real natural gas: sharp sulfur/rotten-egg smell from mercaptan additive — distinct, unmistakable, gets stronger near the leak. Heater smell first cycle of season: faint dusty/burning smell that fades within 15-20 minutes (dust burning off the heat exchanger). Electrical/melting plastic smell: acrid, sharp, persists — shut down at the breaker, call us. If you smell sulfur even faintly: shut the gas valve at the meter, evacuate, call PG&E first (800-743-5000) then us.
My pipes might freeze — how fast do you need to be there?
Bay Area pipe-freeze risk rises when outdoor temps hit 28°F or lower for 6+ hours (rare but happens — late December 2022 saw 26°F in San Jose, January 2024 hit 28°F across the Peninsula). Homes with crawlspace plumbing or exterior-wall pipes are highest risk. We prioritize no-heat calls during freeze warnings. Stopgap: open cabinet doors under sinks, run a pencil-lead trickle of cold water from the highest faucet, and we will be there typically within 1-2 hours.
Do you handle the new R-32 / R-454B refrigerant emergencies?
Yes. Our techs hold EPA Section 608 universal certification (covers all current refrigerants) plus A2L-specific training for the mildly-flammable next-generation refrigerants now shipping in 2025+ equipment. We carry A2L-rated leak detectors (Bacharach H10 PRO), proper recovery cylinders, and follow ignition-source clearance protocols. A2L leaks are not catastrophically dangerous but require different handling than the old R-22/R-410A protocols.
Can you guarantee I will not have a same-issue callback?
Every emergency repair carries a 1-year labor warranty (same as our standard service). If the same component fails within 12 months, we return at no labor charge. We document combustion readings, refrigerant pressures, and electrical measurements on every invoice — so if a call-back happens, we have baseline data to compare against. Our actual callback rate runs about 3.1% across emergency dispatches, which we track quarterly.