Emergency HVAC in Vallejo

When to call 911 instead

A contractor can fix the HVAC system; only the fire department, utility, or hazmat team can make the home safe when a life-safety scenario is unfolding. If any of these apply, get out first, call 911 from outside, and schedule HVAC service once the scene is cleared.

• Suspected carbon-monoxide (CO) leak. If you smell rotten-egg odor, hear hissing from a gas line, or a CO alarm is sounding, leave the home immediately and call 911 from outside. Do not re-enter until the fire department clears the property. Get everyone out first — adults, kids, and pets — before calling. CDC carbon monoxide info · EPA carbon monoxide guide
• Natural-gas leak or suspected gas smell. Call your gas utility's 24/7 emergency line first. Do not operate switches, phones, garage doors, or appliances inside the home — any spark can ignite gas. Before any digging on your property for HVAC repairs (condenser pads, gas-line reroutes, mini-split line-sets), call 811 at least two business days ahead so utility lines are marked. Call 811 before you dig
• HVAC fire, smoke, or visible flame. Evacuate the home, then call 911. Do not attempt to extinguish an electrical or combustion fire at the furnace or air handler without training. Once the fire department clears the scene, contact your homeowner's insurance carrier before an HVAC contractor touches the damaged equipment — photos and adjuster visits come first.
• Test your CO detectors at least once a year. CO detectors have a service life of 5–7 years — check the sensor's "replace by" date on the back of the unit. Batteries get tested annually (spring and fall daylight-saving switches are a common reminder). Install at least one detector on every floor and outside every sleeping area; a single CO event can be fatal at 150+ ppm within two hours. CDC: preventing CO poisoning

What counts as a HVAC emergency

• No heat with outdoor temperatures below freezing — pipe-freeze and health-risk territory.
• No AC during an active heat wave when indoor temps exceed 85°F, especially with vulnerable occupants.
• Burning smell, smoke, or visible flame at the furnace or air handler — shut it off and call immediately.
• Natural-gas odor near the equipment — leave the house, call the utility, then your HVAC pro.
• Furnace repeatedly shorts the breaker or trips the high-limit switch.
• Refrigerant leak with a hissing noise or visible oil staining around the evaporator or lineset.

Typical emergency-call cost

After-hours surcharges typically run about 1.6× the standard rate of $6,318–$17,550. Diagnostic fees are often credited toward the repair when you approve the work on-site — confirm before the tech is dispatched.