What are the specs for this Control Board?

The correct replacement for Tempstar model TCH218AKA1 – Heat Pump | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number TCH218AKA1 – Heat Pump | Ships Today.

Is this control board compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar Defrost Control Board for TCH218AKA1 – Heat Pump | Ships Today

Name: Tempstar Defrost Control Board for TCH218AKA1 – Heat Pump | Ships Today
Brand: Tempstar
SKU: 1086070-GEN
Price: 145.00 USD
Availability: InStock

SKU: 1086070-GEN Brand: Tempstar

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Overview

This OEM defrost control board (part 1086070) is the brain of the defrost cycle on the Tempstar TCH218AKA1 heat pump. It monitors the outdoor coil temperature and accumulated run time, then initiates a defrost cycle to clear frost and ice from the coil during heating season. The board coordinates the reversing valve, compressor, and outdoor fan, and on many platforms energizes auxiliary heat during defrost. A failed board causes a heat pump that ices over and loses heating capacity, never defrosts, or short-cycles. Because it controls high-current and 24V circuits together, a board failure can also leave the compressor or fan dead.

Specifications

Spec	Value
Part Number	1086070
Type	Defrost Control Board
Brand	Tempstar / ICP / Heil
Control Voltage	24V
Function	Defrost timing, reversing valve, fan/compressor control

Compatibility

Direct OEM fit for the Tempstar TCH218AKA1 heat pump, plus matching ICP, Heil, and Comfortmaker heat pumps built on the same chassis. Match the part number on your existing board, as defrost timing pins and harness layout vary between revisions.

Installation Guide

Safety First – Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
Access – Remove the outdoor unit control-panel cover.
Document – Photograph every harness connection and note the defrost timing jumper setting.
Remove – Unplug each connector and unclip or unscrew the old board.
Install – Mount the new board, set the timing jumper to match the original, and reconnect all harnesses per your photo.
Test – Restore power and confirm normal heating operation and a forced or scheduled defrost cycle.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts
Heat pump won't switch between heating and cooling
Short-cycling or no outdoor unit operation
Burnt smell or visible scorching on the board

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

Tempstar Defrost Control Board f...

$145.00

Frequently Asked Questions

Does this Control Board fit my Tempstar TCH218AKA1 – Heat Pump | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar TCH218AKA1 – Heat Pump | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the control board on my Tempstar TCH218AKA1 – Heat Pump | Ships Today?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this control board compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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