Why is my heater blowing cold air?
When a heater blows cold air, these are the usual causes, from simplest to most serious:
- Thermostat set to "fan on" instead of "auto", so the blower runs between heating cycles.
- Dirty filter that makes the furnace overheat and shut its burners off while the fan keeps running.
- Ignition or flame sensor fault: the furnace tries to light, fails, and locks out.
- Heat pump in defrost, or a heat pump with a failed reversing valve that is cooling instead of heating.
- Leaky attic ducts that cool the warm air before it reaches the room.
Check the thermostat setting and the filter first; if the problem stays, we find and fix the cause with an up-front price.

Furnace repair or heat pump repair?
Furnaces and heat pumps fail in different ways:
| System | Typical failures | Details |
|---|---|---|
| Gas furnace | Igniter, flame sensor, inducer motor, pressure and limit switches, blower | Furnace repair |
| Heat pump | Reversing valve, defrost control, refrigerant leaks, outdoor fan | Heat pump repair |
No heat at all: what to check before you call
- Thermostat on "heat", set above room temperature, with fresh batteries if it uses them.
- The furnace switch (it looks like a light switch near the unit) is on, and the breaker is not tripped.
- The filter is not clogged.
- The furnace door is fully closed; a safety switch stops the furnace when it is open.
If all four are fine, the fault is inside the system. Do not keep restarting a furnace that locks out repeatedly.

Emergency heating repair
We offer 24/7 emergency heating repair for no-heat calls on cold nights, especially for homes with babies, older people or anyone unwell. If you smell gas, leave the house and call the gas company before anything else; if a carbon monoxide alarm sounds, get everyone outside and call 911.
When to replace your heating system instead
A cracked heat exchanger, repeated failures in the same season, or an old furnace paired with a failing AC are the usual signs that replacement is the better buy. We price both; see heating installation and furnace installation.

What customers say about our heating repairs
"Expert Heating System Repair! When my heating system malfunctioned, Elvira Ocean & Air came to the rescue."
"The technician arrived on time and quickly identified the issue. He made the necessary repairs efficiently."
"Sam was professional, courteous, promptly responded to calls and texts, and an expert in his craft."
Heating repair questions
Why does my furnace turn on and off every few minutes?
Short cycling usually comes from a dirty filter that makes the furnace overheat, a dirty flame sensor, or a thermostat in the wrong spot. It wears the furnace quickly, so have it checked.
Is a burning smell normal when the heat first comes on?
A dusty smell for the first few minutes of the season is normal. A smell that stays, or smells electrical, means turn it off and call.
