The best replacement power vent pressure switch is the one that matches the original appliance part number and pressure rating. The ClimaTek B13701-26 is a candidate for Goodman or Janitrol systems calling for that part, while the Goodman B13701-42 is an OEM option for systems requiring that exact number. The 0.55-inch water-column switch is a more specification-focused choice. The pump switch and dryer booster fan below serve different applications, so they should not be treated as furnace pressure-switch replacements.
| Product | Best suited for | Key detail |
|---|---|---|
| ClimaTek B13701-26 | Replacement by listed part number | References B13701-26 and B1370126 |
| Goodman B13701-42 | Goodman OEM replacement | Two terminals and one hose port |
| ClimaTek 0.55-inch WC | Matching a specified pressure rating | Listed at 0.55″ WC |
| General Pump YPRESSWITCH | Matching pump-switch applications | Not identified as a furnace vent switch |
| MIDCVFRUN dryer booster fan | Boosting dryer exhaust airflow | Fan with airflow-sensing pressure switch |
ClimaTek B13701-26 Furnace Pressure Switch
Best for: Buyers replacing a furnace pressure switch identified as Goodman or Janitrol B13701-26, B1370126, or another part number explicitly confirmed by the appliance documentation.
The listing describes this as a new ClimaTek furnace air pressure switch and a replacement part for the stated numbers. That makes the part-number match the main reason to consider it. Before ordering, compare the number on the existing switch and the furnace’s parts information; a similar appearance alone is not enough to establish that a switch is suitable.
Why it stands out: The listing names multiple replacement numbers, which can help buyers researching an older switch whose number appears with or without a hyphen. It is a direct replacement-part option rather than a complete venting accessory.
Limitation: The supplied product details do not state a pressure rating, terminal arrangement, or hose-port count. Avoid choosing it based only on the brand or general furnace description if the original part number cannot be verified.
Goodman OEM B13701-42 Pressure Switch
Best for: Buyers whose furnace documentation or existing component specifies Goodman part B13701-42.
This listing identifies the switch as a Goodman OEM pressure switch and describes it as a new, upgraded OEM furnace air pressure switch. It has two wiring terminals and one hose port, details that can help with a physical comparison to the original part. The exact OEM part number is the strongest selection criterion; terminal and hose layout are useful secondary checks.
Why it stands out: This is the clearest OEM-oriented option in the list. Choose it if the service information calls for B13701-42 and you want a switch identified as a Goodman part.
Limitation: The supplied features do not provide the switch’s pressure setpoint or additional compatible model numbers. Do not assume that B13701-42 replaces the B13701-26 variant; verify the required part number for the specific furnace.
ClimaTek 0.55-Inch WC Vent Switch
Best for: Buyers who have confirmed that the equipment calls for a vent air pressure switch rated at 0.55 inches water column and that this replacement matches the required part.
The listed product is a furnace vent air pressure switch described as a replacement part, with a stated rating of 0.55″ WC. Water column is a pressure measurement used in many low-pressure applications. This published rating gives buyers a useful specification to compare against the appliance’s parts information.
Why it stands out: It is the specification-led option among the furnace vent switches here. Choose it when the required rating is known, rather than relying on a broad search phrase such as “power vent pressure switch.”
Limitation: The supplied information does not identify a furnace brand, model range, terminal arrangement, or hose-port details. A matching pressure rating by itself does not prove that a switch is the correct replacement.
General Pump YPRESSWITCH
Best for: Buyers looking for a pressure switch for an application that specifically calls for the General Pump YPRESSWITCH and matches its published limits.
The supplied feature information lists a maximum temperature of 195 degrees Fahrenheit. The product name also gives a maximum pressure of 3,550 and a 250-volt rating. These are application-specific limits to check against the equipment requirements before purchase.
Why it is included:** It is a pressure-switch product, but the listing details do not describe it as a furnace vent air pressure switch. It is included as a contrast for buyers comparing pressure-switch searches across different equipment categories, not as a recommended substitute for a furnace power vent switch.
Limitation: The provided information does not specify a furnace use, vent pressure rating, hose connection, or compatibility with the furnace models mentioned above. Avoid this product for a furnace repair unless the manufacturer’s documentation specifically calls for it.
MIDCVFRUN Dryer Booster Fan
Best for: Buyers seeking a dryer exhaust booster fan with automatic activation, not a replacement furnace pressure switch.
This product is described as a 4-inch inline dryer vent fan with 260 CFM airflow. Its built-in airflow sensor uses a diaphragm pressure switch to detect airflow and activate the fan. The listing also describes adjustable pressure settings and an anti-clog design. These features concern dryer duct airflow and fan operation rather than furnace combustion vent proving.
Why it is included: Its pressure switch is part of a complete dryer booster fan assembly. That distinction may help buyers who searched broadly for a pressure switch but actually need an accessory to support dryer exhaust airflow.
Limitation: It is not identified as a standalone furnace vent switch or a furnace replacement part. The stated 4-inch design is for standard dryer ducting, so do not select it for a furnace simply because the listing mentions a pressure switch.
Buying Guide: How to Choose a Power Vent Pressure Switch
How do you identify the correct replacement?
Start with the furnace or appliance model number and the part number printed on the existing switch. Confirm the required replacement number in the equipment’s parts documentation or with a qualified service professional. A product title may mention a brand or a similar part family, but that does not establish compatibility with every model in that family.
If the original part number is missing or unreadable, record the appliance model and any visible switch markings. Compare the electrical terminal arrangement, hose connection, and pressure specification only after identifying what the equipment requires. These details are checks, not substitutes for a verified part-number match.
Why does the pressure rating matter?
A pressure switch is selected for an intended pressure threshold and application. The ClimaTek vent switch in this list specifies 0.55″ WC, while the Goodman and B13701-26 listings do not provide a pressure rating in the supplied features. Do not assume that two switches with similar shapes or connectors have the same operating threshold.
Use the exact value specified by the appliance manufacturer. Changing the pressure-switch rating or bypassing the switch can interfere with the equipment’s safety controls. If the required specification is unclear, consult the furnace documentation or a qualified technician instead of estimating.
What should you compare before ordering?
- Part number: Check the complete number, including digits and suffixes. B13701-26 and B13701-42 are different listed parts and should not be treated as interchangeable without confirmation.
- Application: Confirm whether the switch is for a furnace vent, a pump, or a dryer booster fan. These product categories serve different equipment.
- Pressure specification: Match the required setpoint and measurement units when the information is available.
- Connections: Compare terminal count and hose-port configuration with the required switch details.
- Product scope: Distinguish a standalone replacement switch from a complete assembly that includes a fan.
Is a dryer booster pressure switch the same as a furnace vent switch?
No. The dryer product listed here is a fan assembly with an airflow-sensing pressure switch. A furnace vent pressure switch is a component specified for the furnace’s venting and control system. Their shared use of the words “pressure switch” does not make them interchangeable. Choose equipment according to its intended application and documented part requirements.
Should you replace a pressure switch yourself?
That depends on your training and the appliance manufacturer’s instructions. Furnace pressure switches are connected to an operating system and should not be bypassed or modified to make equipment run. If a furnace will not operate, the switch may be one part of a broader problem; a vent obstruction, hose issue, wiring fault, or another condition may require diagnosis. Follow the manufacturer’s safety guidance and use a qualified HVAC professional when the cause is uncertain.
Frequently Asked Questions
What does a furnace vent pressure switch do?
It monitors a pressure condition associated with the furnace’s venting system and participates in the appliance’s operating controls. The exact function and required switch specification depend on the furnace design.
Can I replace B13701-26 with B13701-42?
Do not assume they are interchangeable. The supplied listings identify them as separate part numbers. Verify the correct number using the furnace’s model-specific parts information.
What does 0.55″ WC mean?
It means 0.55 inches of water column, a pressure measurement. The number is useful only when it matches the pressure-switch requirement specified for the equipment.
Is the General Pump YPRESSWITCH a furnace switch?
The provided listing details do not identify it as a furnace vent pressure switch. Its stated pressure and temperature limits do not establish furnace compatibility.
Does the dryer booster fan replace a furnace pressure switch?
No. It is described as a dryer vent fan with a built-in airflow-sensing pressure switch, not as a furnace replacement component.
What if I cannot read the original switch number?
Use the appliance model number and manufacturer parts documentation to identify the required switch. If the correct component remains uncertain, ask a qualified service professional to confirm it before ordering.