Lennox Pellet Stove Proof of Fire Switch: H5887

Replacement low limit proof of fire snap switch for select Lennox pellet stoves. This switch controls the stove out of "STARTUP" mode and into "RUN" mode. This switch also turns off the stove when the stove is cool after "SHUTDOWN" or if the stove runs out of fuel.

Replacement For Part Number:

• H5887

These are all of the confirmed compatible units for this product. Where To Find Your Make & Model

Check these against the part you are replacing before ordering. If a dimension does not match, contact us and we will confirm the fit.

Length (in)	2 ¼"
Width (in)	2"
Height (in)	1 ⅛"
Open Temp (F)	Normally
Close Temp (F)	140
Material	Ceramic
Mounting Type	Air Stream (Hole)
Switch Size	Large
Mounting Holes Distance	0.9375"
Weight	1.50 oz

Install Instructions For Lennox Pellet Stove Proof of Fire Switch: H5887

Instructional Documents

• Install Instructions PDF for Lennox H5887

Instructional Notes

Instructions for Installing Low-Limit Switch part # H5887, 12057601, (140°F-20 low-limit switch):

Lennox: Elite Montage/ IHP IronStrike 32FS

Whitfield: Advantage, Cascade, Legend, Quest, Renaissance or Prodigy II:

• To replace this switch, locate the side of the stove where the combustion blower is mounted. The switch is located on the exhaust blower housing.
• Make sure that your stove is unplugged.
• Using a flat head screw driver, loosen the two contact points for the wires and remove the two fork connectors. using a 1/4" socket wrench, remove the two hex screws that hold the switch to the housing.
• If your new switch does not have screws for connecting the wires, use the screws from the old switch.
• Install the new switch to the housing. Reconnect your wires. It does not matter which wire goes on which terminal.

Note: Not all Whitfield pellet stoves used a low-limit switch for detecting proof of fire: Profile 20, Profile 30, and Optima units made by Lennox used a "photo-eye", part # 14750404

Troubleshooting Notes

How Low-Limit Switch, part #12057601, H5887 (140°F-20 low-limit switch) operates:

Switch should be a normally open circuit that closes at 140°F, opens again at fall in temp 140°F-20°F or 120°F. This switch is mounted in the air path of the exhaust and is commonly not malfunctioning but just dirty on the face of the switch. If your wire contacts wiggle a little on the switch, this may actually be okay and is common. A bad switch can be determined by heating the switch face directly with the flame of a match or lighter. After a moment you will hear the switch click. After you hear the click test the switch across the terminals for continuity. If there is no circuit present and you have determined that the switch face is over 140°F, replace the switch. Also, if the switch face is <140°F but still has a circuit, also replace the switch.

This is a F110-90 made from a ceramic material which is high-heat tolerant. Because it's normally open, it's most often referred to as a fan switch. At ambient room temperature this switch is normally open or OFF and needs to detect heat to CLOSE to allow power to flow through the circuit. The switch will close at 20 degrees to restore power and will return to it's normal state at 110 degrees to cut power automatically. Failure of this switch happens when it stops opening or closing at the designated temperature thresholds.

Unfortunately, sometimes products do not work like they are supposed to. We offer a 90 day warranty on manufacturer defects. Some manufacturers make this a very simple and easy process unfortunately others do not. Items must be used in accordance with the manufacturers guidelines to qualify for warranty replacement. Please be advised that warranty claims for special parts may take up to 4 weeks for processing, and customers are responsible for return shipping charges.

This Item Qualifies For Free Shipping With Orders Over $99!

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