Top 10 Replacements for Discontinued Honeywell Flame Safeguards
If you’ve been relying on older Honeywell flame safeguard relays like the RA890F, R4795A, or RM7840, you may have discovered that many of these models are now discontinued or increasingly difficult to source. As burner systems age, facilities are faced with a critical question: what’s the best drop-in replacement that maintains safety, performance, and compliance? Whether you’re an MRO technician managing a school’s boiler room or an engineer overseeing a process burner in a pharmaceutical plant, finding the right modern alternative can be the difference between smooth uptime and costly delays.
This guide highlights ten of the most common discontinued Honeywell flame safeguard controls and the best available replacements—many of which are part of the RM7800 series or comparable Fireye controllers. We’ll cover what part numbers they replace, what compatibility considerations to keep in mind, and where to find them. If you’re searching for “RA890F replacement” or “R4795A upgrade,” this list is built for you. Read on for the top replacement options trusted across commercial, institutional, and industrial burner systems. Whether you’re maintaining a school boiler, upgrading a hospital burner, or sourcing spares for a critical process, TCI supply can keep your facility running smoothly.
1. RA890F1288 → RM7890A1015
Why: The RA890F relay is obsolete, but the RM7890A1015 offers direct functionality replacement in many burner applications, with added microprocessor control.
Upgrade Tip: Use the Q7800A1005 subbase and appropriate flame amplifier (e.g. R7847A1033 for rectification sensors).
2. R4795A → RM7800L1012
Why: The R4795A was an early relay-based controller. The RM7800L1012 provides lockout timing, recycling burner control, and full LED diagnostics.
Note: Flame sensor and amplifier compatibility must be checked. Many systems also require a retrofit base. If you want a cheaper option, TCI Supply suggests the Honeywell RM7895A1014, but you must also replace the amplifier, timing card, and subbase
3. RM7840L1075 → RM7897A1015
Why: The RM7897A1015 includes early spark termination and interrupted pilot sequencing—functionally replacing most RM7840L applications.
Pro Tip: Reuse the Q7800 base, but verify flame sensor and amplifier compatibility.
4. R7247A → R7847A1033
Why: R7247A was a self-contained flame rectifier relay. The R7847A1033 is a modern amplifier module that works with RM7800-series controls.
Use Case: Perfect for upgrading older systems using rectification sensors without changing the entire burner logic. Upgrade to RM7800’S Series Controls. Provide TCI Supply with the original Contgrol numbers. Will need a new purge timer and Q7800 Subbase
5. R7795 → RM7838A1014
Why: The RM7838A1014 adds modulator control and sequencing to replace older R7795 logic systems.
Popular In: Schools, older boiler systems, and commercial burners.
6. RA890G1260 → RM7890A1015
Why: The RM7895A1014 offers non-recycling control with expanded diagnostics—an ideal RA890G replacement.
Bonus: Accepts the same subbase style (Q7800 series), simplifying field replacement. Replace Flame Signal Amplifier with Honeywell R7849A1023
7. R7455A1012 → RM7823A1011
Why: This is a common upgrade path from older plug-in flame relays to modern programmable logic. RM7823A1011 supports interrupted pilot ignition with enhanced LED feedback.
Caution: Ensure your flame rod or UV sensor is compatible or upgrade it to match RM-series amplifier specs.
8. RM7895A1014 → RM7895C1016
Why: The RM7895A1014 is widely available. RM7895C1016 is backward compatible in most applications with upgraded firmware and broader amplifier support.
Quick Fix: You can often swap the controller directly onto your existing subbase with no wiring changes.
9. R7761A → RM7800E1012
Why: The RM7800E provides valve proving logic and lockout diagnostics that the R7761 lacked. A modern upgrade for compliance and safety.
Note: You’ll likely need a new subbase and amplifier module.
10. Honeywell RM7890A1015 → Fireye MEC120
Why: The RM7890A1015 is a primary control module used for on-off or modulating burner applications. Fireye’s MEC120 from the Flame-Monitor series offers similar functionality with expanded diagnostics and optional remote communications via Modbus.
Compatibility Note: Requires use of Fireye’s EP or ED series amplifiers and compatible UV or flame rod scanners.
11.Honeywell RM7895A1014 → Fireye MBCE-110S
Why: RM7895A1014 is a commonly used burner controller with interrupted pilot sequencing. Fireye’s MBCE-110S offers comparable features, flexible programming, and built-in diagnostics with the added benefit of serial communication.
Fireye Equivalent: MBCE-110S
Compatible Amplifiers: EB700 (UV), EC600 (flame rod), or ED510 (IR)
Upgrade Tip: Ensure proper scanner type match and use Fireye’s standard mounting base
Final Thoughts: Always Verify Compatibility
Upgrading from discontinued Honeywell controls isn’t always “plug-and-play.” You’ll need to match:
- Flame sensor type (UV, IR, or rectification)
- Amplifier module
- Subbase compatibility
- Burner sequencing logic (interrupted vs. intermittent pilot)
If you’re unsure which replacement fits your system, contact TCI Supply for expert guidance.