The short answer
$150–$400
The pressure switch proves the inducer is pulling exhaust out before the furnace is allowed to light. The switch itself is inexpensive. Most of the visit is finding out why it didn’t close, because the cause is often the vent, the tubing or the inducer, not the switch.
Typical industry ranges for Western Washington — not a quote. Your exact price comes upfront, before any work starts, and you approve it first.
What moves the price
Bad switch or a venting problem
Most pressure switch codes mean the switch is doing its job. A blocked vent pipe, a cracked or water-filled hose, or a clogged condensate drain keeps it from closing. A new switch on a blocked vent fails the same way.
High-efficiency furnaces
On a 90%-plus furnace, water that can’t drain backs up where the switch senses pressure. A plugged trap, or PVC vent pipes outside blocked by snow or ice, is a common cold-night cause, and clearing it is often the whole repair.
The exact replacement
Each switch is rated for one pressure on that furnace. The new one has to match the original part, and it must never be jumped out: it is the safety that keeps exhaust out of the house.
The inducer motor
If the inducer is weak or failing, the switch never sees enough suction. Then the inducer is the repair, and that costs more.
Furnace starts, hums, then won’t light?
That’s often the pressure switch refusing to close. We find out why, then fix that. Exact price upfront.
Get My Upfront Quote60 seconds online · or call (253) 766-4822
Typical ranges at a glance
Typical industry ranges for Western Washington — not a quote. Your exact price comes upfront, before any work starts, and you approve it first.
Been told you need a new pressure switch?
Pressure switches get replaced on a guess more than almost any other furnace part, because the code says pressure switch. The code only says the switch didn’t close. A technician should check the vent, the hose and the inducer’s suction with a manometer before replacing it. Ask what it read.
We test it and show you the result before anything is replaced. If it tests fine, we say so.
Book a Second LookHow it works
- 1
Book online or call. Tell us what it’s doing, or what you were quoted. We diagnose it ourselves either way.
- 2
We test it and show you what we found. If the part tests fine, it isn’t the problem, and we tell you so.
- 3
You approve the exact price first. Nothing is replaced until you say go.
Where we work
From our base in Covington.
King County
Covington, Kent, Renton, Maple Valley, Black Diamond, Auburn, Enumclaw, Federal Way, Des Moines, Pacific, Algona
Pierce County
Sumner, Bonney Lake, Lake Tapps
Not on the list? Book it anyway and a technician confirms within 1 business hour.
Why homeowners call us
- You approve the price first. Exact price upfront, before any work starts.
- We answer 24/7. A technician reaches out within 1 business hour.
- 500+ jobs done by 4.9★ rated technicians. Licensed & insured.
- Fixed right, guaranteed. If it’s not right, we make it right.
Quick answers
What does a furnace pressure switch do?
It’s a safety. When the furnace starts, the inducer motor pulls air through the burners and out the vent. The pressure switch senses that suction, and only then lets the igniter and gas valve come on. No draft, no flame.
What are the signs of a bad pressure switch?
The inducer runs but the furnace never lights, the control board flashes a pressure switch code, or the furnace tries, stops and tries again. A blocked vent or drain shows the same signs, which is why it needs testing.
Why does my pressure switch keep tripping?
Usually venting: snow or ice over the PVC pipes outside, a plugged condensate drain, water in the switch hose, or a sagging vent pipe. Sometimes a weak inducer. A switch that trips again and again is pointing at a problem, not failing over and over.
Can I bypass the pressure switch?
Never. It’s what keeps exhaust and carbon monoxide from coming into the house. Clearing snow from the vent pipes outside is a safe thing to check yourself. Then turn the thermostat off and back on once.
Is it the pressure switch or the inducer motor?
We test both: the suction the inducer makes, read on a manometer, and whether the switch closes at its rated pressure. If the suction is low, the inducer or the vent is the problem, not the switch.
How long does the repair take?
Swapping the switch is quick. Finding why it didn’t close is what takes the time, and it’s what stops the new one tripping too.
How do I get my exact price?
Book online or call. A technician reaches out within 1 business hour, tests the part, and gives you the exact price before any work starts. You approve it first.
Ranges are for websites. Quotes are for you.
Book in 60 seconds — a tech reaches out within 1 business hour and your exact price comes before any work.
Get My Upfront Quote60 seconds online · or call (253) 766-4822
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Furnace won't turn on? · Furnace short cycling? · Inducer motor cost · Furnace repair cost · troubleshooting guides