42-23116-01 – HEAT SEQUENCER (SPST)
$38.2624V SPST heat sequencer. OEM Rheem/Ruud part for electric furnaces. Single-pole single-throw configuration for staging one heating element.
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42-23116-06 – HEAT SEQUENCER (DPST)
$36.9224V DPST heat sequencer. OEM Rheem/Ruud part for electric furnaces. Double-pole single-throw for controlling two circuits simultaneously.
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42-23116-07 – HEAT SEQUENCER (TPST)
$37.1624V TPST heat sequencer. OEM Rheem/Ruud part for electric furnaces. Triple-pole single-throw for staging three circuits on timed delay.
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42-23116-08 – HEAT SEQUENCER (DPST)
$31.0224V DPST heat sequencer. OEM Rheem/Ruud part for electric furnaces. Double-pole single-throw configuration. Different timing than 42-23116-06.
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42-23116-09 – HEAT SEQUENCER (TPST)
$40.2724V TPST heat sequencer. OEM Rheem/Ruud part for electric furnaces. Triple-pole single-throw for staging three circuits. Different timing than 42-23116-07.
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88K09 – HEAT SEQUENCER (TRIPLE STACKED)
$74.9324V triple-stacked heat sequencer for Lennox electric furnaces. Thermal time delay relay that stages heating elements and fan activation.
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HK61EA033 – RECTIFIER BOARD (1186788)
$52.72Carrier/Bryant/Payne rectifier board. Converts AC to DC for relay control in electric heat systems. OEM part HK61EA033, replaces older HK61EA003.
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HN61PC003 – RELAY (CARRIER, DC, 1172506)
$43.8224V DPST relay with 30-amp capacity. OEM Carrier/Bryant/Payne part HN61PC003. Replaces older HN61PC002 and cross-reference T92S7D22-24.
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HS1P1S – HEAT SEQUENCER (SPST, Q101)
$27.3524V SPST heat sequencer (1 switch). Supco Q101. Basic single-stage sequencer for electric furnaces. Controls one heating element or blower.
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HS1P2S – HEAT SEQUENCER (SPST, Q102)
$28.4024V SPST heat sequencer (1 switch). Supco Q102. Longer delay timing than Q101. Controls one heating element or blower in electric furnaces.
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HS2P1S – HEAT SEQUENCER (DPDT, Q103)
$29.4524V DPDT heat sequencer (2 switches). Supco Q103. Controls a heating element and a blower motor on timed delays. Replaces 24A34-3.
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HS2P2S – HEAT SEQUENCER (DPDT, Q104)
$29.4524V DPDT heat sequencer (2 switches). Supco Q104. Different delay timing than Q103. Replaces HS24A344, Emerson E143, and NS104.
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HS3P1S – HEAT SEQUENCER (HS24A345, DPST-SPST)
$41.8124V heat sequencer with 1 DPST and 1 SPST relay in series. Handles up to 25 amps. Replaces Nordyne 621678 and HS24A345. Common electric furnace part.
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HS4P1S – HEAT SEQUENCER (HS24A346, 2 DPDT)
$42.4024V heat sequencer with two DPDT relays in series. Handles up to 25 amps. Replaces HS24A346. For electric furnaces with multi-stage heating elements.
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PR1922 – RELAY (DC)
$29.3322V DC SPST relay for electric heaters in ICP/Heil/Tempstar units. Rated 30A at 28V DC and 40A at 277V AC. Direct replacement for ICP furnaces.
Signs You May Need a New Heat Sequencer
Heat sequencers are used in electric furnaces and heat pump air handlers to stage heating elements on in sequence rather than all at once, preventing a massive electrical surge.
Some Heating Elements Work but Others Don't▼
- The system heats but not to the set temperature — some stages aren't engaging.
- You can visually inspect the elements through the access panel — only some glow orange.
- A failed sequencer won't energize its associated heating element.
All Heat Strips Come On at Once▼
- A stuck-closed sequencer sends power to all elements simultaneously.
- This draws a massive amount of current and can trip the breaker.
- You may notice lights dimming throughout the house when the heat turns on.
No Heat at All from Electric Furnace▼
- The blower runs but the air isn't warm.
- If all sequencers have failed open, no heating elements receive power.
- Check for a blown fuse on the circuit board as well.
Not sure which part you need? Bring your old part to our Dallas store — our team will test it for free and help you find the right replacement.
📞 (214) 340-9421Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
📞 (214) 340-9421Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm