---
product_id: 37643140
title: "780-845 Ignition Module, Intermittent Pilot, 24V"
price: "1028.45 DT"
currency: TND
in_stock: true
reviews_count: 8
url: https://www.desertcart.tn/products/37643140-780-845-ignition-module-intermittent-pilot-24v
store_origin: TN
region: Tunisia
---

# 24V power for reliable ignition Auto retry with 1-hour lockout 90s spark with 6min purge delay 780-845 Ignition Module, Intermittent Pilot, 24V

**Price:** 1028.45 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Ignite your comfort with confidence ⚡

## Quick Answers

- **What is this?** 780-845 Ignition Module, Intermittent Pilot, 24V
- **How much does it cost?** 1028.45 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/37643140-780-845-ignition-module-intermittent-pilot-24v)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Dependable:** Trusted by thousands with a 4.5-star rating and proven long-term performance.
- • **Smart Safety Lockout:** After 3 failed ignition attempts, locks out for 1 hour to prevent gas leaks and hazards.
- • **Effortless Installation:** 1/4" quick connect terminals make swapping modules a breeze—no HVAC degree needed.
- • **Universal Compatibility:** Fits both residential and commercial heating systems with a universal mounting bracket.
- • **Precision Pilot Flame Monitoring:** Continuously senses pilot flame to ensure safe, uninterrupted heating cycles.

## Overview

The Robertshaw 780-845 Ignition Module is a 24V intermittent pilot control designed for residential and commercial heating systems. It features continuous pilot flame monitoring, a universal bracket for easy installation, and a smart lockout safety mechanism that prevents unsafe ignition attempts. With quick-connect terminals and a proven track record, it’s the go-to upgrade for reliable furnace ignition and peace of mind.

## Description

When the thermostat calls for heat, the 780-845 control simultaneously initiates ignition sparking and opens the pilot valve portion of the gas valve. Pilot flame recognition stops ignition sparking and opens the main valve portion of the gas valve. Pilot burner flame is continuously monitored at a synchronous frequency for the duration of the heating cycle. Should the pilot flame fail during the heating cycle, the control will shut off the main valve until the pilot flame is established. The 780-845 lockout ignition control provides 90 seconds of spark, followed by a 6 minute time delay [purge] between ignition attempts. After three tries, if no pilot flame is sensed, the control goes into a one-hour lockout period. At the end of the lockout period, if the demand for heat is still present, the unit will repeat the three tries for ignition.

Review: I’m buying it again. - Worked out perfectly.
Review: Replaced a Lennox SP745 Module - My original Lennox furnace from 1990 stopped working and the HVAC repairman told me that my ignition board module is no longer working which is causing it to not sense the burning pilot flame thus not lighting the burners. I was quoted $500 to replace the board, fair or not, I didn't want to waste that kind of money on a furnace WAYYY past replacement life but money is very tight and I wanted to at least limp along until I can afford a new furnace. The model of my board is a Lennox SP745 and I've read that this 780-845 is the replacement for mine so I ordered it. I shut the power off to the furnace and swapped the board in 5-10 minutes. Very easy, just take note which color wire goes to what on the old board and then match it up to the new board. The only difference is that my old board had "IGN" for the spark wire and the new board had "SPARK" labeled for that. I turned it on, waited a few minutes and BAM, the burners lit and no more wearing a sweater and jacket inside the house! I will update if anything changes. **** UPDATE ***** 25 month update: Everything is still working! The only minor issue with my furnace now is that during heavy winter use the pilot light goes out once a week which then blows cold air. Luckily I just have to flip the breaker off for 10-20 seconds and the pilot re-ignites and blows warm again. I don't know if this ignition module is to blame or if it's something else on this ancient need to replace soon furnace.

## Features

- Ignition module
- Intermittent pilot ignition
- Electrical connections: 1/4" quick connect
- Bracket: universal
- For use with residential & commercial heating equipment

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003U1RA3Q |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #197,728 in Automotive ( See Top 100 in Automotive ) #52 in Automotive Replacement Ignition Control Units |
| Customer Reviews | 4.5 4.5 out of 5 stars (231) |
| Date First Available | May 6, 2009 |
| Included Components | Product & Instructions Guide |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 14.4 ounces |
| Item model number | 780-845 |
| Manufacturer | Standard Plumbing Supply |
| Part Number | 780-845 |
| Product Dimensions | 4.75 x 1.5 x 3 inches |
| Thickness | 1 Inches |
| Voltage | 24 Volts |

## Images

![780-845 Ignition Module, Intermittent Pilot, 24V - Image 1](https://m.media-amazon.com/images/I/81+gPRqI-KL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ I’m buying it again.
*by J***Y on December 25, 2025*

Worked out perfectly.

### ⭐⭐⭐⭐⭐ Replaced a Lennox SP745 Module
*by R***Y on March 7, 2019*

My original Lennox furnace from 1990 stopped working and the HVAC repairman told me that my ignition board module is no longer working which is causing it to not sense the burning pilot flame thus not lighting the burners. I was quoted $500 to replace the board, fair or not, I didn't want to waste that kind of money on a furnace WAYYY past replacement life but money is very tight and I wanted to at least limp along until I can afford a new furnace. The model of my board is a Lennox SP745 and I've read that this 780-845 is the replacement for mine so I ordered it. I shut the power off to the furnace and swapped the board in 5-10 minutes. Very easy, just take note which color wire goes to what on the old board and then match it up to the new board. The only difference is that my old board had "IGN" for the spark wire and the new board had "SPARK" labeled for that. I turned it on, waited a few minutes and BAM, the burners lit and no more wearing a sweater and jacket inside the house! I will update if anything changes. **** UPDATE ***** 25 month update: Everything is still working! The only minor issue with my furnace now is that during heavy winter use the pilot light goes out once a week which then blows cold air. Luckily I just have to flip the breaker off for 10-20 seconds and the pilot re-ignites and blows warm again. I don't know if this ignition module is to blame or if it's something else on this ancient need to replace soon furnace.

### ⭐⭐⭐⭐⭐ Fantastic
*by S***X on January 15, 2020*

I have an old Carrier 58gsc. It would start, sometimes, then stop. Wiggling the wires seemed to help so I decided the springs connector to the lockout/ignition controller LH33WZ512A had worn out. The 6-pin connector on the old controller looked hard to replace so I took a chance and ordered this controller with friendlier looking connectors. I used $7 worth of "disconnect" terminals that came with a crimping tool and it was within my capabilities. Installation notes: I didn't seem to need to hook everything up. 'PV/MV common' and 'Transformer ground' on the new controller were left floating. I connected the sense to the adjacent terminal on the controller as suggested by the instructions. From the old connector to the new controller: Black - ground Blue - Thermostat 24V Yellow - Pilot Valve White - Main Valve Brown - No connection (This floats at 24V when the furnace is on. I think it has something to do with the old flame sensing mechanism but this controller doesn't seem to need it.) I was really pleased how quickly the furnace started up. Just a few seconds; much quicker than the old controller. Also, when I turned off the gas, the controller immediately locked out until I turned the thermostat down and back up again. Seems safe. Not sure how the flame sensing works; seems like magic; but works. At one point I connected the brown wire to PV which is wrong and the controller LED blinked then shut down which was helpful in guessing the connections. I had paid some con artist $90 to quote me $650 to replace the perfectly good control valve. This box fixed my problem for $80. Great product!

## Frequently Bought Together

- Robertshaw 780-845 Ignition Module, Intermittent Pilot, 24V
- Heat N Glo Thermocouple For Heat And Glo And Hearth & Home Fire Places
- Hearth & Home Technologies Replacement Variable Valve, Natural Gas (750-500)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-03-24*